diff options
Diffstat (limited to '.venv/lib/python3.12/site-packages/attr')
23 files changed, 6381 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/attr/__init__.py b/.venv/lib/python3.12/site-packages/attr/__init__.py new file mode 100644 index 00000000..5c6e0650 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/__init__.py @@ -0,0 +1,104 @@ +# SPDX-License-Identifier: MIT + +""" +Classes Without Boilerplate +""" + +from functools import partial +from typing import Callable, Literal, Protocol + +from . import converters, exceptions, filters, setters, validators +from ._cmp import cmp_using +from ._config import get_run_validators, set_run_validators +from ._funcs import asdict, assoc, astuple, has, resolve_types +from ._make import ( + NOTHING, + Attribute, + Converter, + Factory, + _Nothing, + attrib, + attrs, + evolve, + fields, + fields_dict, + make_class, + validate, +) +from ._next_gen import define, field, frozen, mutable +from ._version_info import VersionInfo + + +s = attributes = attrs +ib = attr = attrib +dataclass = partial(attrs, auto_attribs=True) # happy Easter ;) + + +class AttrsInstance(Protocol): + pass + + +NothingType = Literal[_Nothing.NOTHING] + +__all__ = [ + "NOTHING", + "Attribute", + "AttrsInstance", + "Converter", + "Factory", + "NothingType", + "asdict", + "assoc", + "astuple", + "attr", + "attrib", + "attributes", + "attrs", + "cmp_using", + "converters", + "define", + "evolve", + "exceptions", + "field", + "fields", + "fields_dict", + "filters", + "frozen", + "get_run_validators", + "has", + "ib", + "make_class", + "mutable", + "resolve_types", + "s", + "set_run_validators", + "setters", + "validate", + "validators", +] + + +def _make_getattr(mod_name: str) -> Callable: + """ + Create a metadata proxy for packaging information that uses *mod_name* in + its warnings and errors. + """ + + def __getattr__(name: str) -> str: + if name not in ("__version__", "__version_info__"): + msg = f"module {mod_name} has no attribute {name}" + raise AttributeError(msg) + + from importlib.metadata import metadata + + meta = metadata("attrs") + + if name == "__version_info__": + return VersionInfo._from_version_string(meta["version"]) + + return meta["version"] + + return __getattr__ + + +__getattr__ = _make_getattr(__name__) diff --git a/.venv/lib/python3.12/site-packages/attr/__init__.pyi b/.venv/lib/python3.12/site-packages/attr/__init__.pyi new file mode 100644 index 00000000..133e5010 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/__init__.pyi @@ -0,0 +1,389 @@ +import enum +import sys + +from typing import ( + Any, + Callable, + Generic, + Literal, + Mapping, + Protocol, + Sequence, + TypeVar, + overload, +) + +# `import X as X` is required to make these public +from . import converters as converters +from . import exceptions as exceptions +from . import filters as filters +from . import setters as setters +from . import validators as validators +from ._cmp import cmp_using as cmp_using +from ._typing_compat import AttrsInstance_ +from ._version_info import VersionInfo +from attrs import ( + define as define, + field as field, + mutable as mutable, + frozen as frozen, + _EqOrderType, + _ValidatorType, + _ConverterType, + _ReprArgType, + _OnSetAttrType, + _OnSetAttrArgType, + _FieldTransformer, + _ValidatorArgType, +) + +if sys.version_info >= (3, 10): + from typing import TypeGuard, TypeAlias +else: + from typing_extensions import TypeGuard, TypeAlias + +if sys.version_info >= (3, 11): + from typing import dataclass_transform +else: + from typing_extensions import dataclass_transform + +__version__: str +__version_info__: VersionInfo +__title__: str +__description__: str +__url__: str +__uri__: str +__author__: str +__email__: str +__license__: str +__copyright__: str + +_T = TypeVar("_T") +_C = TypeVar("_C", bound=type) + +_FilterType = Callable[["Attribute[_T]", _T], bool] + +# We subclass this here to keep the protocol's qualified name clean. +class AttrsInstance(AttrsInstance_, Protocol): + pass + +_A = TypeVar("_A", bound=type[AttrsInstance]) + +class _Nothing(enum.Enum): + NOTHING = enum.auto() + +NOTHING = _Nothing.NOTHING +NothingType: TypeAlias = Literal[_Nothing.NOTHING] + +# NOTE: Factory lies about its return type to make this possible: +# `x: List[int] # = Factory(list)` +# Work around mypy issue #4554 in the common case by using an overload. + +@overload +def Factory(factory: Callable[[], _T]) -> _T: ... +@overload +def Factory( + factory: Callable[[Any], _T], + takes_self: Literal[True], +) -> _T: ... +@overload +def Factory( + factory: Callable[[], _T], + takes_self: Literal[False], +) -> _T: ... + +In = TypeVar("In") +Out = TypeVar("Out") + +class Converter(Generic[In, Out]): + @overload + def __init__(self, converter: Callable[[In], Out]) -> None: ... + @overload + def __init__( + self, + converter: Callable[[In, AttrsInstance, Attribute], Out], + *, + takes_self: Literal[True], + takes_field: Literal[True], + ) -> None: ... + @overload + def __init__( + self, + converter: Callable[[In, Attribute], Out], + *, + takes_field: Literal[True], + ) -> None: ... + @overload + def __init__( + self, + converter: Callable[[In, AttrsInstance], Out], + *, + takes_self: Literal[True], + ) -> None: ... + +class Attribute(Generic[_T]): + name: str + default: _T | None + validator: _ValidatorType[_T] | None + repr: _ReprArgType + cmp: _EqOrderType + eq: _EqOrderType + order: _EqOrderType + hash: bool | None + init: bool + converter: Converter | None + metadata: dict[Any, Any] + type: type[_T] | None + kw_only: bool + on_setattr: _OnSetAttrType + alias: str | None + + def evolve(self, **changes: Any) -> "Attribute[Any]": ... + +# NOTE: We had several choices for the annotation to use for type arg: +# 1) Type[_T] +# - Pros: Handles simple cases correctly +# - Cons: Might produce less informative errors in the case of conflicting +# TypeVars e.g. `attr.ib(default='bad', type=int)` +# 2) Callable[..., _T] +# - Pros: Better error messages than #1 for conflicting TypeVars +# - Cons: Terrible error messages for validator checks. +# e.g. attr.ib(type=int, validator=validate_str) +# -> error: Cannot infer function type argument +# 3) type (and do all of the work in the mypy plugin) +# - Pros: Simple here, and we could customize the plugin with our own errors. +# - Cons: Would need to write mypy plugin code to handle all the cases. +# We chose option #1. + +# `attr` lies about its return type to make the following possible: +# attr() -> Any +# attr(8) -> int +# attr(validator=<some callable>) -> Whatever the callable expects. +# This makes this type of assignments possible: +# x: int = attr(8) +# +# This form catches explicit None or no default but with no other arguments +# returns Any. +@overload +def attrib( + default: None = ..., + validator: None = ..., + repr: _ReprArgType = ..., + cmp: _EqOrderType | None = ..., + hash: bool | None = ..., + init: bool = ..., + metadata: Mapping[Any, Any] | None = ..., + type: None = ..., + converter: None = ..., + factory: None = ..., + kw_only: bool = ..., + eq: _EqOrderType | None = ..., + order: _EqOrderType | None = ..., + on_setattr: _OnSetAttrArgType | None = ..., + alias: str | None = ..., +) -> Any: ... + +# This form catches an explicit None or no default and infers the type from the +# other arguments. +@overload +def attrib( + default: None = ..., + validator: _ValidatorArgType[_T] | None = ..., + repr: _ReprArgType = ..., + cmp: _EqOrderType | None = ..., + hash: bool | None = ..., + init: bool = ..., + metadata: Mapping[Any, Any] | None = ..., + type: type[_T] | None = ..., + converter: _ConverterType + | list[_ConverterType] + | tuple[_ConverterType] + | None = ..., + factory: Callable[[], _T] | None = ..., + kw_only: bool = ..., + eq: _EqOrderType | None = ..., + order: _EqOrderType | None = ..., + on_setattr: _OnSetAttrArgType | None = ..., + alias: str | None = ..., +) -> _T: ... + +# This form catches an explicit default argument. +@overload +def attrib( + default: _T, + validator: _ValidatorArgType[_T] | None = ..., + repr: _ReprArgType = ..., + cmp: _EqOrderType | None = ..., + hash: bool | None = ..., + init: bool = ..., + metadata: Mapping[Any, Any] | None = ..., + type: type[_T] | None = ..., + converter: _ConverterType + | list[_ConverterType] + | tuple[_ConverterType] + | None = ..., + factory: Callable[[], _T] | None = ..., + kw_only: bool = ..., + eq: _EqOrderType | None = ..., + order: _EqOrderType | None = ..., + on_setattr: _OnSetAttrArgType | None = ..., + alias: str | None = ..., +) -> _T: ... + +# This form covers type=non-Type: e.g. forward references (str), Any +@overload +def attrib( + default: _T | None = ..., + validator: _ValidatorArgType[_T] | None = ..., + repr: _ReprArgType = ..., + cmp: _EqOrderType | None = ..., + hash: bool | None = ..., + init: bool = ..., + metadata: Mapping[Any, Any] | None = ..., + type: object = ..., + converter: _ConverterType + | list[_ConverterType] + | tuple[_ConverterType] + | None = ..., + factory: Callable[[], _T] | None = ..., + kw_only: bool = ..., + eq: _EqOrderType | None = ..., + order: _EqOrderType | None = ..., + on_setattr: _OnSetAttrArgType | None = ..., + alias: str | None = ..., +) -> Any: ... +@overload +@dataclass_transform(order_default=True, field_specifiers=(attrib, field)) +def attrs( + maybe_cls: _C, + these: dict[str, Any] | None = ..., + repr_ns: str | None = ..., + repr: bool = ..., + cmp: _EqOrderType | None = ..., + hash: bool | None = ..., + init: bool = ..., + slots: bool = ..., + frozen: bool = ..., + weakref_slot: bool = ..., + str: bool = ..., + auto_attribs: bool = ..., + kw_only: bool = ..., + cache_hash: bool = ..., + auto_exc: bool = ..., + eq: _EqOrderType | None = ..., + order: _EqOrderType | None = ..., + auto_detect: bool = ..., + collect_by_mro: bool = ..., + getstate_setstate: bool | None = ..., + on_setattr: _OnSetAttrArgType | None = ..., + field_transformer: _FieldTransformer | None = ..., + match_args: bool = ..., + unsafe_hash: bool | None = ..., +) -> _C: ... +@overload +@dataclass_transform(order_default=True, field_specifiers=(attrib, field)) +def attrs( + maybe_cls: None = ..., + these: dict[str, Any] | None = ..., + repr_ns: str | None = ..., + repr: bool = ..., + cmp: _EqOrderType | None = ..., + hash: bool | None = ..., + init: bool = ..., + slots: bool = ..., + frozen: bool = ..., + weakref_slot: bool = ..., + str: bool = ..., + auto_attribs: bool = ..., + kw_only: bool = ..., + cache_hash: bool = ..., + auto_exc: bool = ..., + eq: _EqOrderType | None = ..., + order: _EqOrderType | None = ..., + auto_detect: bool = ..., + collect_by_mro: bool = ..., + getstate_setstate: bool | None = ..., + on_setattr: _OnSetAttrArgType | None = ..., + field_transformer: _FieldTransformer | None = ..., + match_args: bool = ..., + unsafe_hash: bool | None = ..., +) -> Callable[[_C], _C]: ... +def fields(cls: type[AttrsInstance]) -> Any: ... +def fields_dict(cls: type[AttrsInstance]) -> dict[str, Attribute[Any]]: ... +def validate(inst: AttrsInstance) -> None: ... +def resolve_types( + cls: _A, + globalns: dict[str, Any] | None = ..., + localns: dict[str, Any] | None = ..., + attribs: list[Attribute[Any]] | None = ..., + include_extras: bool = ..., +) -> _A: ... + +# TODO: add support for returning a proper attrs class from the mypy plugin +# we use Any instead of _CountingAttr so that e.g. `make_class('Foo', +# [attr.ib()])` is valid +def make_class( + name: str, + attrs: list[str] | tuple[str, ...] | dict[str, Any], + bases: tuple[type, ...] = ..., + class_body: dict[str, Any] | None = ..., + repr_ns: str | None = ..., + repr: bool = ..., + cmp: _EqOrderType | None = ..., + hash: bool | None = ..., + init: bool = ..., + slots: bool = ..., + frozen: bool = ..., + weakref_slot: bool = ..., + str: bool = ..., + auto_attribs: bool = ..., + kw_only: bool = ..., + cache_hash: bool = ..., + auto_exc: bool = ..., + eq: _EqOrderType | None = ..., + order: _EqOrderType | None = ..., + collect_by_mro: bool = ..., + on_setattr: _OnSetAttrArgType | None = ..., + field_transformer: _FieldTransformer | None = ..., +) -> type: ... + +# _funcs -- + +# TODO: add support for returning TypedDict from the mypy plugin +# FIXME: asdict/astuple do not honor their factory args. Waiting on one of +# these: +# https://github.com/python/mypy/issues/4236 +# https://github.com/python/typing/issues/253 +# XXX: remember to fix attrs.asdict/astuple too! +def asdict( + inst: AttrsInstance, + recurse: bool = ..., + filter: _FilterType[Any] | None = ..., + dict_factory: type[Mapping[Any, Any]] = ..., + retain_collection_types: bool = ..., + value_serializer: Callable[[type, Attribute[Any], Any], Any] | None = ..., + tuple_keys: bool | None = ..., +) -> dict[str, Any]: ... + +# TODO: add support for returning NamedTuple from the mypy plugin +def astuple( + inst: AttrsInstance, + recurse: bool = ..., + filter: _FilterType[Any] | None = ..., + tuple_factory: type[Sequence[Any]] = ..., + retain_collection_types: bool = ..., +) -> tuple[Any, ...]: ... +def has(cls: type) -> TypeGuard[type[AttrsInstance]]: ... +def assoc(inst: _T, **changes: Any) -> _T: ... +def evolve(inst: _T, **changes: Any) -> _T: ... + +# _config -- + +def set_run_validators(run: bool) -> None: ... +def get_run_validators() -> bool: ... + +# aliases -- + +s = attributes = attrs +ib = attr = attrib +dataclass = attrs # Technically, partial(attrs, auto_attribs=True) ;) diff --git a/.venv/lib/python3.12/site-packages/attr/_cmp.py b/.venv/lib/python3.12/site-packages/attr/_cmp.py new file mode 100644 index 00000000..09bab491 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_cmp.py @@ -0,0 +1,160 @@ +# SPDX-License-Identifier: MIT + + +import functools +import types + +from ._make import __ne__ + + +_operation_names = {"eq": "==", "lt": "<", "le": "<=", "gt": ">", "ge": ">="} + + +def cmp_using( + eq=None, + lt=None, + le=None, + gt=None, + ge=None, + require_same_type=True, + class_name="Comparable", +): + """ + Create a class that can be passed into `attrs.field`'s ``eq``, ``order``, + and ``cmp`` arguments to customize field comparison. + + The resulting class will have a full set of ordering methods if at least + one of ``{lt, le, gt, ge}`` and ``eq`` are provided. + + Args: + eq (typing.Callable | None): + Callable used to evaluate equality of two objects. + + lt (typing.Callable | None): + Callable used to evaluate whether one object is less than another + object. + + le (typing.Callable | None): + Callable used to evaluate whether one object is less than or equal + to another object. + + gt (typing.Callable | None): + Callable used to evaluate whether one object is greater than + another object. + + ge (typing.Callable | None): + Callable used to evaluate whether one object is greater than or + equal to another object. + + require_same_type (bool): + When `True`, equality and ordering methods will return + `NotImplemented` if objects are not of the same type. + + class_name (str | None): Name of class. Defaults to "Comparable". + + See `comparison` for more details. + + .. versionadded:: 21.1.0 + """ + + body = { + "__slots__": ["value"], + "__init__": _make_init(), + "_requirements": [], + "_is_comparable_to": _is_comparable_to, + } + + # Add operations. + num_order_functions = 0 + has_eq_function = False + + if eq is not None: + has_eq_function = True + body["__eq__"] = _make_operator("eq", eq) + body["__ne__"] = __ne__ + + if lt is not None: + num_order_functions += 1 + body["__lt__"] = _make_operator("lt", lt) + + if le is not None: + num_order_functions += 1 + body["__le__"] = _make_operator("le", le) + + if gt is not None: + num_order_functions += 1 + body["__gt__"] = _make_operator("gt", gt) + + if ge is not None: + num_order_functions += 1 + body["__ge__"] = _make_operator("ge", ge) + + type_ = types.new_class( + class_name, (object,), {}, lambda ns: ns.update(body) + ) + + # Add same type requirement. + if require_same_type: + type_._requirements.append(_check_same_type) + + # Add total ordering if at least one operation was defined. + if 0 < num_order_functions < 4: + if not has_eq_function: + # functools.total_ordering requires __eq__ to be defined, + # so raise early error here to keep a nice stack. + msg = "eq must be define is order to complete ordering from lt, le, gt, ge." + raise ValueError(msg) + type_ = functools.total_ordering(type_) + + return type_ + + +def _make_init(): + """ + Create __init__ method. + """ + + def __init__(self, value): + """ + Initialize object with *value*. + """ + self.value = value + + return __init__ + + +def _make_operator(name, func): + """ + Create operator method. + """ + + def method(self, other): + if not self._is_comparable_to(other): + return NotImplemented + + result = func(self.value, other.value) + if result is NotImplemented: + return NotImplemented + + return result + + method.__name__ = f"__{name}__" + method.__doc__ = ( + f"Return a {_operation_names[name]} b. Computed by attrs." + ) + + return method + + +def _is_comparable_to(self, other): + """ + Check whether `other` is comparable to `self`. + """ + return all(func(self, other) for func in self._requirements) + + +def _check_same_type(self, other): + """ + Return True if *self* and *other* are of the same type, False otherwise. + """ + return other.value.__class__ is self.value.__class__ diff --git a/.venv/lib/python3.12/site-packages/attr/_cmp.pyi b/.venv/lib/python3.12/site-packages/attr/_cmp.pyi new file mode 100644 index 00000000..cc7893b0 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_cmp.pyi @@ -0,0 +1,13 @@ +from typing import Any, Callable + +_CompareWithType = Callable[[Any, Any], bool] + +def cmp_using( + eq: _CompareWithType | None = ..., + lt: _CompareWithType | None = ..., + le: _CompareWithType | None = ..., + gt: _CompareWithType | None = ..., + ge: _CompareWithType | None = ..., + require_same_type: bool = ..., + class_name: str = ..., +) -> type: ... diff --git a/.venv/lib/python3.12/site-packages/attr/_compat.py b/.venv/lib/python3.12/site-packages/attr/_compat.py new file mode 100644 index 00000000..22fcd783 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_compat.py @@ -0,0 +1,94 @@ +# SPDX-License-Identifier: MIT + +import inspect +import platform +import sys +import threading + +from collections.abc import Mapping, Sequence # noqa: F401 +from typing import _GenericAlias + + +PYPY = platform.python_implementation() == "PyPy" +PY_3_9_PLUS = sys.version_info[:2] >= (3, 9) +PY_3_10_PLUS = sys.version_info[:2] >= (3, 10) +PY_3_11_PLUS = sys.version_info[:2] >= (3, 11) +PY_3_12_PLUS = sys.version_info[:2] >= (3, 12) +PY_3_13_PLUS = sys.version_info[:2] >= (3, 13) +PY_3_14_PLUS = sys.version_info[:2] >= (3, 14) + + +if PY_3_14_PLUS: # pragma: no cover + import annotationlib + + _get_annotations = annotationlib.get_annotations + +else: + + def _get_annotations(cls): + """ + Get annotations for *cls*. + """ + return cls.__dict__.get("__annotations__", {}) + + +class _AnnotationExtractor: + """ + Extract type annotations from a callable, returning None whenever there + is none. + """ + + __slots__ = ["sig"] + + def __init__(self, callable): + try: + self.sig = inspect.signature(callable) + except (ValueError, TypeError): # inspect failed + self.sig = None + + def get_first_param_type(self): + """ + Return the type annotation of the first argument if it's not empty. + """ + if not self.sig: + return None + + params = list(self.sig.parameters.values()) + if params and params[0].annotation is not inspect.Parameter.empty: + return params[0].annotation + + return None + + def get_return_type(self): + """ + Return the return type if it's not empty. + """ + if ( + self.sig + and self.sig.return_annotation is not inspect.Signature.empty + ): + return self.sig.return_annotation + + return None + + +# Thread-local global to track attrs instances which are already being repr'd. +# This is needed because there is no other (thread-safe) way to pass info +# about the instances that are already being repr'd through the call stack +# in order to ensure we don't perform infinite recursion. +# +# For instance, if an instance contains a dict which contains that instance, +# we need to know that we're already repr'ing the outside instance from within +# the dict's repr() call. +# +# This lives here rather than in _make.py so that the functions in _make.py +# don't have a direct reference to the thread-local in their globals dict. +# If they have such a reference, it breaks cloudpickle. +repr_context = threading.local() + + +def get_generic_base(cl): + """If this is a generic class (A[str]), return the generic base for it.""" + if cl.__class__ is _GenericAlias: + return cl.__origin__ + return None diff --git a/.venv/lib/python3.12/site-packages/attr/_config.py b/.venv/lib/python3.12/site-packages/attr/_config.py new file mode 100644 index 00000000..4b257726 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_config.py @@ -0,0 +1,31 @@ +# SPDX-License-Identifier: MIT + +__all__ = ["get_run_validators", "set_run_validators"] + +_run_validators = True + + +def set_run_validators(run): + """ + Set whether or not validators are run. By default, they are run. + + .. deprecated:: 21.3.0 It will not be removed, but it also will not be + moved to new ``attrs`` namespace. Use `attrs.validators.set_disabled()` + instead. + """ + if not isinstance(run, bool): + msg = "'run' must be bool." + raise TypeError(msg) + global _run_validators + _run_validators = run + + +def get_run_validators(): + """ + Return whether or not validators are run. + + .. deprecated:: 21.3.0 It will not be removed, but it also will not be + moved to new ``attrs`` namespace. Use `attrs.validators.get_disabled()` + instead. + """ + return _run_validators diff --git a/.venv/lib/python3.12/site-packages/attr/_funcs.py b/.venv/lib/python3.12/site-packages/attr/_funcs.py new file mode 100644 index 00000000..c39fb8aa --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_funcs.py @@ -0,0 +1,468 @@ +# SPDX-License-Identifier: MIT + + +import copy + +from ._compat import PY_3_9_PLUS, get_generic_base +from ._make import _OBJ_SETATTR, NOTHING, fields +from .exceptions import AttrsAttributeNotFoundError + + +def asdict( + inst, + recurse=True, + filter=None, + dict_factory=dict, + retain_collection_types=False, + value_serializer=None, +): + """ + Return the *attrs* attribute values of *inst* as a dict. + + Optionally recurse into other *attrs*-decorated classes. + + Args: + inst: Instance of an *attrs*-decorated class. + + recurse (bool): Recurse into classes that are also *attrs*-decorated. + + filter (~typing.Callable): + A callable whose return code determines whether an attribute or + element is included (`True`) or dropped (`False`). Is called with + the `attrs.Attribute` as the first argument and the value as the + second argument. + + dict_factory (~typing.Callable): + A callable to produce dictionaries from. For example, to produce + ordered dictionaries instead of normal Python dictionaries, pass in + ``collections.OrderedDict``. + + retain_collection_types (bool): + Do not convert to `list` when encountering an attribute whose type + is `tuple` or `set`. Only meaningful if *recurse* is `True`. + + value_serializer (typing.Callable | None): + A hook that is called for every attribute or dict key/value. It + receives the current instance, field and value and must return the + (updated) value. The hook is run *after* the optional *filter* has + been applied. + + Returns: + Return type of *dict_factory*. + + Raises: + attrs.exceptions.NotAnAttrsClassError: + If *cls* is not an *attrs* class. + + .. versionadded:: 16.0.0 *dict_factory* + .. versionadded:: 16.1.0 *retain_collection_types* + .. versionadded:: 20.3.0 *value_serializer* + .. versionadded:: 21.3.0 + If a dict has a collection for a key, it is serialized as a tuple. + """ + attrs = fields(inst.__class__) + rv = dict_factory() + for a in attrs: + v = getattr(inst, a.name) + if filter is not None and not filter(a, v): + continue + + if value_serializer is not None: + v = value_serializer(inst, a, v) + + if recurse is True: + if has(v.__class__): + rv[a.name] = asdict( + v, + recurse=True, + filter=filter, + dict_factory=dict_factory, + retain_collection_types=retain_collection_types, + value_serializer=value_serializer, + ) + elif isinstance(v, (tuple, list, set, frozenset)): + cf = v.__class__ if retain_collection_types is True else list + items = [ + _asdict_anything( + i, + is_key=False, + filter=filter, + dict_factory=dict_factory, + retain_collection_types=retain_collection_types, + value_serializer=value_serializer, + ) + for i in v + ] + try: + rv[a.name] = cf(items) + except TypeError: + if not issubclass(cf, tuple): + raise + # Workaround for TypeError: cf.__new__() missing 1 required + # positional argument (which appears, for a namedturle) + rv[a.name] = cf(*items) + elif isinstance(v, dict): + df = dict_factory + rv[a.name] = df( + ( + _asdict_anything( + kk, + is_key=True, + filter=filter, + dict_factory=df, + retain_collection_types=retain_collection_types, + value_serializer=value_serializer, + ), + _asdict_anything( + vv, + is_key=False, + filter=filter, + dict_factory=df, + retain_collection_types=retain_collection_types, + value_serializer=value_serializer, + ), + ) + for kk, vv in v.items() + ) + else: + rv[a.name] = v + else: + rv[a.name] = v + return rv + + +def _asdict_anything( + val, + is_key, + filter, + dict_factory, + retain_collection_types, + value_serializer, +): + """ + ``asdict`` only works on attrs instances, this works on anything. + """ + if getattr(val.__class__, "__attrs_attrs__", None) is not None: + # Attrs class. + rv = asdict( + val, + recurse=True, + filter=filter, + dict_factory=dict_factory, + retain_collection_types=retain_collection_types, + value_serializer=value_serializer, + ) + elif isinstance(val, (tuple, list, set, frozenset)): + if retain_collection_types is True: + cf = val.__class__ + elif is_key: + cf = tuple + else: + cf = list + + rv = cf( + [ + _asdict_anything( + i, + is_key=False, + filter=filter, + dict_factory=dict_factory, + retain_collection_types=retain_collection_types, + value_serializer=value_serializer, + ) + for i in val + ] + ) + elif isinstance(val, dict): + df = dict_factory + rv = df( + ( + _asdict_anything( + kk, + is_key=True, + filter=filter, + dict_factory=df, + retain_collection_types=retain_collection_types, + value_serializer=value_serializer, + ), + _asdict_anything( + vv, + is_key=False, + filter=filter, + dict_factory=df, + retain_collection_types=retain_collection_types, + value_serializer=value_serializer, + ), + ) + for kk, vv in val.items() + ) + else: + rv = val + if value_serializer is not None: + rv = value_serializer(None, None, rv) + + return rv + + +def astuple( + inst, + recurse=True, + filter=None, + tuple_factory=tuple, + retain_collection_types=False, +): + """ + Return the *attrs* attribute values of *inst* as a tuple. + + Optionally recurse into other *attrs*-decorated classes. + + Args: + inst: Instance of an *attrs*-decorated class. + + recurse (bool): + Recurse into classes that are also *attrs*-decorated. + + filter (~typing.Callable): + A callable whose return code determines whether an attribute or + element is included (`True`) or dropped (`False`). Is called with + the `attrs.Attribute` as the first argument and the value as the + second argument. + + tuple_factory (~typing.Callable): + A callable to produce tuples from. For example, to produce lists + instead of tuples. + + retain_collection_types (bool): + Do not convert to `list` or `dict` when encountering an attribute + which type is `tuple`, `dict` or `set`. Only meaningful if + *recurse* is `True`. + + Returns: + Return type of *tuple_factory* + + Raises: + attrs.exceptions.NotAnAttrsClassError: + If *cls* is not an *attrs* class. + + .. versionadded:: 16.2.0 + """ + attrs = fields(inst.__class__) + rv = [] + retain = retain_collection_types # Very long. :/ + for a in attrs: + v = getattr(inst, a.name) + if filter is not None and not filter(a, v): + continue + if recurse is True: + if has(v.__class__): + rv.append( + astuple( + v, + recurse=True, + filter=filter, + tuple_factory=tuple_factory, + retain_collection_types=retain, + ) + ) + elif isinstance(v, (tuple, list, set, frozenset)): + cf = v.__class__ if retain is True else list + items = [ + ( + astuple( + j, + recurse=True, + filter=filter, + tuple_factory=tuple_factory, + retain_collection_types=retain, + ) + if has(j.__class__) + else j + ) + for j in v + ] + try: + rv.append(cf(items)) + except TypeError: + if not issubclass(cf, tuple): + raise + # Workaround for TypeError: cf.__new__() missing 1 required + # positional argument (which appears, for a namedturle) + rv.append(cf(*items)) + elif isinstance(v, dict): + df = v.__class__ if retain is True else dict + rv.append( + df( + ( + ( + astuple( + kk, + tuple_factory=tuple_factory, + retain_collection_types=retain, + ) + if has(kk.__class__) + else kk + ), + ( + astuple( + vv, + tuple_factory=tuple_factory, + retain_collection_types=retain, + ) + if has(vv.__class__) + else vv + ), + ) + for kk, vv in v.items() + ) + ) + else: + rv.append(v) + else: + rv.append(v) + + return rv if tuple_factory is list else tuple_factory(rv) + + +def has(cls): + """ + Check whether *cls* is a class with *attrs* attributes. + + Args: + cls (type): Class to introspect. + + Raises: + TypeError: If *cls* is not a class. + + Returns: + bool: + """ + attrs = getattr(cls, "__attrs_attrs__", None) + if attrs is not None: + return True + + # No attrs, maybe it's a specialized generic (A[str])? + generic_base = get_generic_base(cls) + if generic_base is not None: + generic_attrs = getattr(generic_base, "__attrs_attrs__", None) + if generic_attrs is not None: + # Stick it on here for speed next time. + cls.__attrs_attrs__ = generic_attrs + return generic_attrs is not None + return False + + +def assoc(inst, **changes): + """ + Copy *inst* and apply *changes*. + + This is different from `evolve` that applies the changes to the arguments + that create the new instance. + + `evolve`'s behavior is preferable, but there are `edge cases`_ where it + doesn't work. Therefore `assoc` is deprecated, but will not be removed. + + .. _`edge cases`: https://github.com/python-attrs/attrs/issues/251 + + Args: + inst: Instance of a class with *attrs* attributes. + + changes: Keyword changes in the new copy. + + Returns: + A copy of inst with *changes* incorporated. + + Raises: + attrs.exceptions.AttrsAttributeNotFoundError: + If *attr_name* couldn't be found on *cls*. + + attrs.exceptions.NotAnAttrsClassError: + If *cls* is not an *attrs* class. + + .. deprecated:: 17.1.0 + Use `attrs.evolve` instead if you can. This function will not be + removed du to the slightly different approach compared to + `attrs.evolve`, though. + """ + new = copy.copy(inst) + attrs = fields(inst.__class__) + for k, v in changes.items(): + a = getattr(attrs, k, NOTHING) + if a is NOTHING: + msg = f"{k} is not an attrs attribute on {new.__class__}." + raise AttrsAttributeNotFoundError(msg) + _OBJ_SETATTR(new, k, v) + return new + + +def resolve_types( + cls, globalns=None, localns=None, attribs=None, include_extras=True +): + """ + Resolve any strings and forward annotations in type annotations. + + This is only required if you need concrete types in :class:`Attribute`'s + *type* field. In other words, you don't need to resolve your types if you + only use them for static type checking. + + With no arguments, names will be looked up in the module in which the class + was created. If this is not what you want, for example, if the name only + exists inside a method, you may pass *globalns* or *localns* to specify + other dictionaries in which to look up these names. See the docs of + `typing.get_type_hints` for more details. + + Args: + cls (type): Class to resolve. + + globalns (dict | None): Dictionary containing global variables. + + localns (dict | None): Dictionary containing local variables. + + attribs (list | None): + List of attribs for the given class. This is necessary when calling + from inside a ``field_transformer`` since *cls* is not an *attrs* + class yet. + + include_extras (bool): + Resolve more accurately, if possible. Pass ``include_extras`` to + ``typing.get_hints``, if supported by the typing module. On + supported Python versions (3.9+), this resolves the types more + accurately. + + Raises: + TypeError: If *cls* is not a class. + + attrs.exceptions.NotAnAttrsClassError: + If *cls* is not an *attrs* class and you didn't pass any attribs. + + NameError: If types cannot be resolved because of missing variables. + + Returns: + *cls* so you can use this function also as a class decorator. Please + note that you have to apply it **after** `attrs.define`. That means the + decorator has to come in the line **before** `attrs.define`. + + .. versionadded:: 20.1.0 + .. versionadded:: 21.1.0 *attribs* + .. versionadded:: 23.1.0 *include_extras* + """ + # Since calling get_type_hints is expensive we cache whether we've + # done it already. + if getattr(cls, "__attrs_types_resolved__", None) != cls: + import typing + + kwargs = {"globalns": globalns, "localns": localns} + + if PY_3_9_PLUS: + kwargs["include_extras"] = include_extras + + hints = typing.get_type_hints(cls, **kwargs) + for field in fields(cls) if attribs is None else attribs: + if field.name in hints: + # Since fields have been frozen we must work around it. + _OBJ_SETATTR(field, "type", hints[field.name]) + # We store the class we resolved so that subclasses know they haven't + # been resolved. + cls.__attrs_types_resolved__ = cls + + # Return the class so you can use it as a decorator too. + return cls diff --git a/.venv/lib/python3.12/site-packages/attr/_make.py b/.venv/lib/python3.12/site-packages/attr/_make.py new file mode 100644 index 00000000..e84d9792 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_make.py @@ -0,0 +1,3123 @@ +# SPDX-License-Identifier: MIT + +from __future__ import annotations + +import abc +import contextlib +import copy +import enum +import inspect +import itertools +import linecache +import sys +import types +import unicodedata + +from collections.abc import Callable, Mapping +from functools import cached_property +from typing import Any, NamedTuple, TypeVar + +# We need to import _compat itself in addition to the _compat members to avoid +# having the thread-local in the globals here. +from . import _compat, _config, setters +from ._compat import ( + PY_3_10_PLUS, + PY_3_11_PLUS, + PY_3_13_PLUS, + _AnnotationExtractor, + _get_annotations, + get_generic_base, +) +from .exceptions import ( + DefaultAlreadySetError, + FrozenInstanceError, + NotAnAttrsClassError, + UnannotatedAttributeError, +) + + +# This is used at least twice, so cache it here. +_OBJ_SETATTR = object.__setattr__ +_INIT_FACTORY_PAT = "__attr_factory_%s" +_CLASSVAR_PREFIXES = ( + "typing.ClassVar", + "t.ClassVar", + "ClassVar", + "typing_extensions.ClassVar", +) +# we don't use a double-underscore prefix because that triggers +# name mangling when trying to create a slot for the field +# (when slots=True) +_HASH_CACHE_FIELD = "_attrs_cached_hash" + +_EMPTY_METADATA_SINGLETON = types.MappingProxyType({}) + +# Unique object for unequivocal getattr() defaults. +_SENTINEL = object() + +_DEFAULT_ON_SETATTR = setters.pipe(setters.convert, setters.validate) + + +class _Nothing(enum.Enum): + """ + Sentinel to indicate the lack of a value when `None` is ambiguous. + + If extending attrs, you can use ``typing.Literal[NOTHING]`` to show + that a value may be ``NOTHING``. + + .. versionchanged:: 21.1.0 ``bool(NOTHING)`` is now False. + .. versionchanged:: 22.2.0 ``NOTHING`` is now an ``enum.Enum`` variant. + """ + + NOTHING = enum.auto() + + def __repr__(self): + return "NOTHING" + + def __bool__(self): + return False + + +NOTHING = _Nothing.NOTHING +""" +Sentinel to indicate the lack of a value when `None` is ambiguous. + +When using in 3rd party code, use `attrs.NothingType` for type annotations. +""" + + +class _CacheHashWrapper(int): + """ + An integer subclass that pickles / copies as None + + This is used for non-slots classes with ``cache_hash=True``, to avoid + serializing a potentially (even likely) invalid hash value. Since `None` + is the default value for uncalculated hashes, whenever this is copied, + the copy's value for the hash should automatically reset. + + See GH #613 for more details. + """ + + def __reduce__(self, _none_constructor=type(None), _args=()): # noqa: B008 + return _none_constructor, _args + + +def attrib( + default=NOTHING, + validator=None, + repr=True, + cmp=None, + hash=None, + init=True, + metadata=None, + type=None, + converter=None, + factory=None, + kw_only=False, + eq=None, + order=None, + on_setattr=None, + alias=None, +): + """ + Create a new field / attribute on a class. + + Identical to `attrs.field`, except it's not keyword-only. + + Consider using `attrs.field` in new code (``attr.ib`` will *never* go away, + though). + + .. warning:: + + Does **nothing** unless the class is also decorated with + `attr.s` (or similar)! + + + .. versionadded:: 15.2.0 *convert* + .. versionadded:: 16.3.0 *metadata* + .. versionchanged:: 17.1.0 *validator* can be a ``list`` now. + .. versionchanged:: 17.1.0 + *hash* is `None` and therefore mirrors *eq* by default. + .. versionadded:: 17.3.0 *type* + .. deprecated:: 17.4.0 *convert* + .. versionadded:: 17.4.0 + *converter* as a replacement for the deprecated *convert* to achieve + consistency with other noun-based arguments. + .. versionadded:: 18.1.0 + ``factory=f`` is syntactic sugar for ``default=attr.Factory(f)``. + .. versionadded:: 18.2.0 *kw_only* + .. versionchanged:: 19.2.0 *convert* keyword argument removed. + .. versionchanged:: 19.2.0 *repr* also accepts a custom callable. + .. deprecated:: 19.2.0 *cmp* Removal on or after 2021-06-01. + .. versionadded:: 19.2.0 *eq* and *order* + .. versionadded:: 20.1.0 *on_setattr* + .. versionchanged:: 20.3.0 *kw_only* backported to Python 2 + .. versionchanged:: 21.1.0 + *eq*, *order*, and *cmp* also accept a custom callable + .. versionchanged:: 21.1.0 *cmp* undeprecated + .. versionadded:: 22.2.0 *alias* + """ + eq, eq_key, order, order_key = _determine_attrib_eq_order( + cmp, eq, order, True + ) + + if hash is not None and hash is not True and hash is not False: + msg = "Invalid value for hash. Must be True, False, or None." + raise TypeError(msg) + + if factory is not None: + if default is not NOTHING: + msg = ( + "The `default` and `factory` arguments are mutually exclusive." + ) + raise ValueError(msg) + if not callable(factory): + msg = "The `factory` argument must be a callable." + raise ValueError(msg) + default = Factory(factory) + + if metadata is None: + metadata = {} + + # Apply syntactic sugar by auto-wrapping. + if isinstance(on_setattr, (list, tuple)): + on_setattr = setters.pipe(*on_setattr) + + if validator and isinstance(validator, (list, tuple)): + validator = and_(*validator) + + if converter and isinstance(converter, (list, tuple)): + converter = pipe(*converter) + + return _CountingAttr( + default=default, + validator=validator, + repr=repr, + cmp=None, + hash=hash, + init=init, + converter=converter, + metadata=metadata, + type=type, + kw_only=kw_only, + eq=eq, + eq_key=eq_key, + order=order, + order_key=order_key, + on_setattr=on_setattr, + alias=alias, + ) + + +def _compile_and_eval( + script: str, + globs: dict[str, Any] | None, + locs: Mapping[str, object] | None = None, + filename: str = "", +) -> None: + """ + Evaluate the script with the given global (globs) and local (locs) + variables. + """ + bytecode = compile(script, filename, "exec") + eval(bytecode, globs, locs) + + +def _linecache_and_compile( + script: str, + filename: str, + globs: dict[str, Any] | None, + locals: Mapping[str, object] | None = None, +) -> dict[str, Any]: + """ + Cache the script with _linecache_, compile it and return the _locals_. + """ + + locs = {} if locals is None else locals + + # In order of debuggers like PDB being able to step through the code, + # we add a fake linecache entry. + count = 1 + base_filename = filename + while True: + linecache_tuple = ( + len(script), + None, + script.splitlines(True), + filename, + ) + old_val = linecache.cache.setdefault(filename, linecache_tuple) + if old_val == linecache_tuple: + break + + filename = f"{base_filename[:-1]}-{count}>" + count += 1 + + _compile_and_eval(script, globs, locs, filename) + + return locs + + +def _make_attr_tuple_class(cls_name: str, attr_names: list[str]) -> type: + """ + Create a tuple subclass to hold `Attribute`s for an `attrs` class. + + The subclass is a bare tuple with properties for names. + + class MyClassAttributes(tuple): + __slots__ = () + x = property(itemgetter(0)) + """ + attr_class_name = f"{cls_name}Attributes" + body = {} + for i, attr_name in enumerate(attr_names): + + def getter(self, i=i): + return self[i] + + body[attr_name] = property(getter) + return type(attr_class_name, (tuple,), body) + + +# Tuple class for extracted attributes from a class definition. +# `base_attrs` is a subset of `attrs`. +class _Attributes(NamedTuple): + attrs: type + base_attrs: list[Attribute] + base_attrs_map: dict[str, type] + + +def _is_class_var(annot): + """ + Check whether *annot* is a typing.ClassVar. + + The string comparison hack is used to avoid evaluating all string + annotations which would put attrs-based classes at a performance + disadvantage compared to plain old classes. + """ + annot = str(annot) + + # Annotation can be quoted. + if annot.startswith(("'", '"')) and annot.endswith(("'", '"')): + annot = annot[1:-1] + + return annot.startswith(_CLASSVAR_PREFIXES) + + +def _has_own_attribute(cls, attrib_name): + """ + Check whether *cls* defines *attrib_name* (and doesn't just inherit it). + """ + return attrib_name in cls.__dict__ + + +def _collect_base_attrs( + cls, taken_attr_names +) -> tuple[list[Attribute], dict[str, type]]: + """ + Collect attr.ibs from base classes of *cls*, except *taken_attr_names*. + """ + base_attrs = [] + base_attr_map = {} # A dictionary of base attrs to their classes. + + # Traverse the MRO and collect attributes. + for base_cls in reversed(cls.__mro__[1:-1]): + for a in getattr(base_cls, "__attrs_attrs__", []): + if a.inherited or a.name in taken_attr_names: + continue + + a = a.evolve(inherited=True) # noqa: PLW2901 + base_attrs.append(a) + base_attr_map[a.name] = base_cls + + # For each name, only keep the freshest definition i.e. the furthest at the + # back. base_attr_map is fine because it gets overwritten with every new + # instance. + filtered = [] + seen = set() + for a in reversed(base_attrs): + if a.name in seen: + continue + filtered.insert(0, a) + seen.add(a.name) + + return filtered, base_attr_map + + +def _collect_base_attrs_broken(cls, taken_attr_names): + """ + Collect attr.ibs from base classes of *cls*, except *taken_attr_names*. + + N.B. *taken_attr_names* will be mutated. + + Adhere to the old incorrect behavior. + + Notably it collects from the front and considers inherited attributes which + leads to the buggy behavior reported in #428. + """ + base_attrs = [] + base_attr_map = {} # A dictionary of base attrs to their classes. + + # Traverse the MRO and collect attributes. + for base_cls in cls.__mro__[1:-1]: + for a in getattr(base_cls, "__attrs_attrs__", []): + if a.name in taken_attr_names: + continue + + a = a.evolve(inherited=True) # noqa: PLW2901 + taken_attr_names.add(a.name) + base_attrs.append(a) + base_attr_map[a.name] = base_cls + + return base_attrs, base_attr_map + + +def _transform_attrs( + cls, these, auto_attribs, kw_only, collect_by_mro, field_transformer +) -> _Attributes: + """ + Transform all `_CountingAttr`s on a class into `Attribute`s. + + If *these* is passed, use that and don't look for them on the class. + + If *collect_by_mro* is True, collect them in the correct MRO order, + otherwise use the old -- incorrect -- order. See #428. + + Return an `_Attributes`. + """ + cd = cls.__dict__ + anns = _get_annotations(cls) + + if these is not None: + ca_list = list(these.items()) + elif auto_attribs is True: + ca_names = { + name + for name, attr in cd.items() + if attr.__class__ is _CountingAttr + } + ca_list = [] + annot_names = set() + for attr_name, type in anns.items(): + if _is_class_var(type): + continue + annot_names.add(attr_name) + a = cd.get(attr_name, NOTHING) + + if a.__class__ is not _CountingAttr: + a = attrib(a) + ca_list.append((attr_name, a)) + + unannotated = ca_names - annot_names + if unannotated: + raise UnannotatedAttributeError( + "The following `attr.ib`s lack a type annotation: " + + ", ".join( + sorted(unannotated, key=lambda n: cd.get(n).counter) + ) + + "." + ) + else: + ca_list = sorted( + ( + (name, attr) + for name, attr in cd.items() + if attr.__class__ is _CountingAttr + ), + key=lambda e: e[1].counter, + ) + + fca = Attribute.from_counting_attr + own_attrs = [ + fca(attr_name, ca, anns.get(attr_name)) for attr_name, ca in ca_list + ] + + if collect_by_mro: + base_attrs, base_attr_map = _collect_base_attrs( + cls, {a.name for a in own_attrs} + ) + else: + base_attrs, base_attr_map = _collect_base_attrs_broken( + cls, {a.name for a in own_attrs} + ) + + if kw_only: + own_attrs = [a.evolve(kw_only=True) for a in own_attrs] + base_attrs = [a.evolve(kw_only=True) for a in base_attrs] + + attrs = base_attrs + own_attrs + + if field_transformer is not None: + attrs = tuple(field_transformer(cls, attrs)) + + # Check attr order after executing the field_transformer. + # Mandatory vs non-mandatory attr order only matters when they are part of + # the __init__ signature and when they aren't kw_only (which are moved to + # the end and can be mandatory or non-mandatory in any order, as they will + # be specified as keyword args anyway). Check the order of those attrs: + had_default = False + for a in (a for a in attrs if a.init is not False and a.kw_only is False): + if had_default is True and a.default is NOTHING: + msg = f"No mandatory attributes allowed after an attribute with a default value or factory. Attribute in question: {a!r}" + raise ValueError(msg) + + if had_default is False and a.default is not NOTHING: + had_default = True + + # Resolve default field alias after executing field_transformer. + # This allows field_transformer to differentiate between explicit vs + # default aliases and supply their own defaults. + for a in attrs: + if not a.alias: + # Evolve is very slow, so we hold our nose and do it dirty. + _OBJ_SETATTR.__get__(a)("alias", _default_init_alias_for(a.name)) + + # Create AttrsClass *after* applying the field_transformer since it may + # add or remove attributes! + attr_names = [a.name for a in attrs] + AttrsClass = _make_attr_tuple_class(cls.__name__, attr_names) + + return _Attributes(AttrsClass(attrs), base_attrs, base_attr_map) + + +def _make_cached_property_getattr(cached_properties, original_getattr, cls): + lines = [ + # Wrapped to get `__class__` into closure cell for super() + # (It will be replaced with the newly constructed class after construction). + "def wrapper(_cls):", + " __class__ = _cls", + " def __getattr__(self, item, cached_properties=cached_properties, original_getattr=original_getattr, _cached_setattr_get=_cached_setattr_get):", + " func = cached_properties.get(item)", + " if func is not None:", + " result = func(self)", + " _setter = _cached_setattr_get(self)", + " _setter(item, result)", + " return result", + ] + if original_getattr is not None: + lines.append( + " return original_getattr(self, item)", + ) + else: + lines.extend( + [ + " try:", + " return super().__getattribute__(item)", + " except AttributeError:", + " if not hasattr(super(), '__getattr__'):", + " raise", + " return super().__getattr__(item)", + " original_error = f\"'{self.__class__.__name__}' object has no attribute '{item}'\"", + " raise AttributeError(original_error)", + ] + ) + + lines.extend( + [ + " return __getattr__", + "__getattr__ = wrapper(_cls)", + ] + ) + + unique_filename = _generate_unique_filename(cls, "getattr") + + glob = { + "cached_properties": cached_properties, + "_cached_setattr_get": _OBJ_SETATTR.__get__, + "original_getattr": original_getattr, + } + + return _linecache_and_compile( + "\n".join(lines), unique_filename, glob, locals={"_cls": cls} + )["__getattr__"] + + +def _frozen_setattrs(self, name, value): + """ + Attached to frozen classes as __setattr__. + """ + if isinstance(self, BaseException) and name in ( + "__cause__", + "__context__", + "__traceback__", + "__suppress_context__", + "__notes__", + ): + BaseException.__setattr__(self, name, value) + return + + raise FrozenInstanceError + + +def _frozen_delattrs(self, name): + """ + Attached to frozen classes as __delattr__. + """ + if isinstance(self, BaseException) and name in ("__notes__",): + BaseException.__delattr__(self, name) + return + + raise FrozenInstanceError + + +def evolve(*args, **changes): + """ + Create a new instance, based on the first positional argument with + *changes* applied. + + .. tip:: + + On Python 3.13 and later, you can also use `copy.replace` instead. + + Args: + + inst: + Instance of a class with *attrs* attributes. *inst* must be passed + as a positional argument. + + changes: + Keyword changes in the new copy. + + Returns: + A copy of inst with *changes* incorporated. + + Raises: + TypeError: + If *attr_name* couldn't be found in the class ``__init__``. + + attrs.exceptions.NotAnAttrsClassError: + If *cls* is not an *attrs* class. + + .. versionadded:: 17.1.0 + .. deprecated:: 23.1.0 + It is now deprecated to pass the instance using the keyword argument + *inst*. It will raise a warning until at least April 2024, after which + it will become an error. Always pass the instance as a positional + argument. + .. versionchanged:: 24.1.0 + *inst* can't be passed as a keyword argument anymore. + """ + try: + (inst,) = args + except ValueError: + msg = ( + f"evolve() takes 1 positional argument, but {len(args)} were given" + ) + raise TypeError(msg) from None + + cls = inst.__class__ + attrs = fields(cls) + for a in attrs: + if not a.init: + continue + attr_name = a.name # To deal with private attributes. + init_name = a.alias + if init_name not in changes: + changes[init_name] = getattr(inst, attr_name) + + return cls(**changes) + + +class _ClassBuilder: + """ + Iteratively build *one* class. + """ + + __slots__ = ( + "_add_method_dunders", + "_attr_names", + "_attrs", + "_base_attr_map", + "_base_names", + "_cache_hash", + "_cls", + "_cls_dict", + "_delete_attribs", + "_frozen", + "_has_custom_setattr", + "_has_post_init", + "_has_pre_init", + "_is_exc", + "_on_setattr", + "_pre_init_has_args", + "_repr_added", + "_script_snippets", + "_slots", + "_weakref_slot", + "_wrote_own_setattr", + ) + + def __init__( + self, + cls: type, + these, + slots, + frozen, + weakref_slot, + getstate_setstate, + auto_attribs, + kw_only, + cache_hash, + is_exc, + collect_by_mro, + on_setattr, + has_custom_setattr, + field_transformer, + ): + attrs, base_attrs, base_map = _transform_attrs( + cls, + these, + auto_attribs, + kw_only, + collect_by_mro, + field_transformer, + ) + + self._cls = cls + self._cls_dict = dict(cls.__dict__) if slots else {} + self._attrs = attrs + self._base_names = {a.name for a in base_attrs} + self._base_attr_map = base_map + self._attr_names = tuple(a.name for a in attrs) + self._slots = slots + self._frozen = frozen + self._weakref_slot = weakref_slot + self._cache_hash = cache_hash + self._has_pre_init = bool(getattr(cls, "__attrs_pre_init__", False)) + self._pre_init_has_args = False + if self._has_pre_init: + # Check if the pre init method has more arguments than just `self` + # We want to pass arguments if pre init expects arguments + pre_init_func = cls.__attrs_pre_init__ + pre_init_signature = inspect.signature(pre_init_func) + self._pre_init_has_args = len(pre_init_signature.parameters) > 1 + self._has_post_init = bool(getattr(cls, "__attrs_post_init__", False)) + self._delete_attribs = not bool(these) + self._is_exc = is_exc + self._on_setattr = on_setattr + + self._has_custom_setattr = has_custom_setattr + self._wrote_own_setattr = False + + self._cls_dict["__attrs_attrs__"] = self._attrs + + if frozen: + self._cls_dict["__setattr__"] = _frozen_setattrs + self._cls_dict["__delattr__"] = _frozen_delattrs + + self._wrote_own_setattr = True + elif on_setattr in ( + _DEFAULT_ON_SETATTR, + setters.validate, + setters.convert, + ): + has_validator = has_converter = False + for a in attrs: + if a.validator is not None: + has_validator = True + if a.converter is not None: + has_converter = True + + if has_validator and has_converter: + break + if ( + ( + on_setattr == _DEFAULT_ON_SETATTR + and not (has_validator or has_converter) + ) + or (on_setattr == setters.validate and not has_validator) + or (on_setattr == setters.convert and not has_converter) + ): + # If class-level on_setattr is set to convert + validate, but + # there's no field to convert or validate, pretend like there's + # no on_setattr. + self._on_setattr = None + + if getstate_setstate: + ( + self._cls_dict["__getstate__"], + self._cls_dict["__setstate__"], + ) = self._make_getstate_setstate() + + # tuples of script, globs, hook + self._script_snippets: list[ + tuple[str, dict, Callable[[dict, dict], Any]] + ] = [] + self._repr_added = False + + # We want to only do this check once; in 99.9% of cases these + # exist. + if not hasattr(self._cls, "__module__") or not hasattr( + self._cls, "__qualname__" + ): + self._add_method_dunders = self._add_method_dunders_safe + else: + self._add_method_dunders = self._add_method_dunders_unsafe + + def __repr__(self): + return f"<_ClassBuilder(cls={self._cls.__name__})>" + + def _eval_snippets(self) -> None: + """ + Evaluate any registered snippets in one go. + """ + script = "\n".join([snippet[0] for snippet in self._script_snippets]) + globs = {} + for _, snippet_globs, _ in self._script_snippets: + globs.update(snippet_globs) + + locs = _linecache_and_compile( + script, + _generate_unique_filename(self._cls, "methods"), + globs, + ) + + for _, _, hook in self._script_snippets: + hook(self._cls_dict, locs) + + def build_class(self): + """ + Finalize class based on the accumulated configuration. + + Builder cannot be used after calling this method. + """ + self._eval_snippets() + if self._slots is True: + cls = self._create_slots_class() + else: + cls = self._patch_original_class() + if PY_3_10_PLUS: + cls = abc.update_abstractmethods(cls) + + # The method gets only called if it's not inherited from a base class. + # _has_own_attribute does NOT work properly for classmethods. + if ( + getattr(cls, "__attrs_init_subclass__", None) + and "__attrs_init_subclass__" not in cls.__dict__ + ): + cls.__attrs_init_subclass__() + + return cls + + def _patch_original_class(self): + """ + Apply accumulated methods and return the class. + """ + cls = self._cls + base_names = self._base_names + + # Clean class of attribute definitions (`attr.ib()`s). + if self._delete_attribs: + for name in self._attr_names: + if ( + name not in base_names + and getattr(cls, name, _SENTINEL) is not _SENTINEL + ): + # An AttributeError can happen if a base class defines a + # class variable and we want to set an attribute with the + # same name by using only a type annotation. + with contextlib.suppress(AttributeError): + delattr(cls, name) + + # Attach our dunder methods. + for name, value in self._cls_dict.items(): + setattr(cls, name, value) + + # If we've inherited an attrs __setattr__ and don't write our own, + # reset it to object's. + if not self._wrote_own_setattr and getattr( + cls, "__attrs_own_setattr__", False + ): + cls.__attrs_own_setattr__ = False + + if not self._has_custom_setattr: + cls.__setattr__ = _OBJ_SETATTR + + return cls + + def _create_slots_class(self): + """ + Build and return a new class with a `__slots__` attribute. + """ + cd = { + k: v + for k, v in self._cls_dict.items() + if k not in (*tuple(self._attr_names), "__dict__", "__weakref__") + } + + # If our class doesn't have its own implementation of __setattr__ + # (either from the user or by us), check the bases, if one of them has + # an attrs-made __setattr__, that needs to be reset. We don't walk the + # MRO because we only care about our immediate base classes. + # XXX: This can be confused by subclassing a slotted attrs class with + # XXX: a non-attrs class and subclass the resulting class with an attrs + # XXX: class. See `test_slotted_confused` for details. For now that's + # XXX: OK with us. + if not self._wrote_own_setattr: + cd["__attrs_own_setattr__"] = False + + if not self._has_custom_setattr: + for base_cls in self._cls.__bases__: + if base_cls.__dict__.get("__attrs_own_setattr__", False): + cd["__setattr__"] = _OBJ_SETATTR + break + + # Traverse the MRO to collect existing slots + # and check for an existing __weakref__. + existing_slots = {} + weakref_inherited = False + for base_cls in self._cls.__mro__[1:-1]: + if base_cls.__dict__.get("__weakref__", None) is not None: + weakref_inherited = True + existing_slots.update( + { + name: getattr(base_cls, name) + for name in getattr(base_cls, "__slots__", []) + } + ) + + base_names = set(self._base_names) + + names = self._attr_names + if ( + self._weakref_slot + and "__weakref__" not in getattr(self._cls, "__slots__", ()) + and "__weakref__" not in names + and not weakref_inherited + ): + names += ("__weakref__",) + + cached_properties = { + name: cached_prop.func + for name, cached_prop in cd.items() + if isinstance(cached_prop, cached_property) + } + + # Collect methods with a `__class__` reference that are shadowed in the new class. + # To know to update them. + additional_closure_functions_to_update = [] + if cached_properties: + class_annotations = _get_annotations(self._cls) + for name, func in cached_properties.items(): + # Add cached properties to names for slotting. + names += (name,) + # Clear out function from class to avoid clashing. + del cd[name] + additional_closure_functions_to_update.append(func) + annotation = inspect.signature(func).return_annotation + if annotation is not inspect.Parameter.empty: + class_annotations[name] = annotation + + original_getattr = cd.get("__getattr__") + if original_getattr is not None: + additional_closure_functions_to_update.append(original_getattr) + + cd["__getattr__"] = _make_cached_property_getattr( + cached_properties, original_getattr, self._cls + ) + + # We only add the names of attributes that aren't inherited. + # Setting __slots__ to inherited attributes wastes memory. + slot_names = [name for name in names if name not in base_names] + + # There are slots for attributes from current class + # that are defined in parent classes. + # As their descriptors may be overridden by a child class, + # we collect them here and update the class dict + reused_slots = { + slot: slot_descriptor + for slot, slot_descriptor in existing_slots.items() + if slot in slot_names + } + slot_names = [name for name in slot_names if name not in reused_slots] + cd.update(reused_slots) + if self._cache_hash: + slot_names.append(_HASH_CACHE_FIELD) + + cd["__slots__"] = tuple(slot_names) + + cd["__qualname__"] = self._cls.__qualname__ + + # Create new class based on old class and our methods. + cls = type(self._cls)(self._cls.__name__, self._cls.__bases__, cd) + + # The following is a fix for + # <https://github.com/python-attrs/attrs/issues/102>. + # If a method mentions `__class__` or uses the no-arg super(), the + # compiler will bake a reference to the class in the method itself + # as `method.__closure__`. Since we replace the class with a + # clone, we rewrite these references so it keeps working. + for item in itertools.chain( + cls.__dict__.values(), additional_closure_functions_to_update + ): + if isinstance(item, (classmethod, staticmethod)): + # Class- and staticmethods hide their functions inside. + # These might need to be rewritten as well. + closure_cells = getattr(item.__func__, "__closure__", None) + elif isinstance(item, property): + # Workaround for property `super()` shortcut (PY3-only). + # There is no universal way for other descriptors. + closure_cells = getattr(item.fget, "__closure__", None) + else: + closure_cells = getattr(item, "__closure__", None) + + if not closure_cells: # Catch None or the empty list. + continue + for cell in closure_cells: + try: + match = cell.cell_contents is self._cls + except ValueError: # noqa: PERF203 + # ValueError: Cell is empty + pass + else: + if match: + cell.cell_contents = cls + return cls + + def add_repr(self, ns): + script, globs = _make_repr_script(self._attrs, ns) + + def _attach_repr(cls_dict, globs): + cls_dict["__repr__"] = self._add_method_dunders(globs["__repr__"]) + + self._script_snippets.append((script, globs, _attach_repr)) + self._repr_added = True + return self + + def add_str(self): + if not self._repr_added: + msg = "__str__ can only be generated if a __repr__ exists." + raise ValueError(msg) + + def __str__(self): + return self.__repr__() + + self._cls_dict["__str__"] = self._add_method_dunders(__str__) + return self + + def _make_getstate_setstate(self): + """ + Create custom __setstate__ and __getstate__ methods. + """ + # __weakref__ is not writable. + state_attr_names = tuple( + an for an in self._attr_names if an != "__weakref__" + ) + + def slots_getstate(self): + """ + Automatically created by attrs. + """ + return {name: getattr(self, name) for name in state_attr_names} + + hash_caching_enabled = self._cache_hash + + def slots_setstate(self, state): + """ + Automatically created by attrs. + """ + __bound_setattr = _OBJ_SETATTR.__get__(self) + if isinstance(state, tuple): + # Backward compatibility with attrs instances pickled with + # attrs versions before v22.2.0 which stored tuples. + for name, value in zip(state_attr_names, state): + __bound_setattr(name, value) + else: + for name in state_attr_names: + if name in state: + __bound_setattr(name, state[name]) + + # The hash code cache is not included when the object is + # serialized, but it still needs to be initialized to None to + # indicate that the first call to __hash__ should be a cache + # miss. + if hash_caching_enabled: + __bound_setattr(_HASH_CACHE_FIELD, None) + + return slots_getstate, slots_setstate + + def make_unhashable(self): + self._cls_dict["__hash__"] = None + return self + + def add_hash(self): + script, globs = _make_hash_script( + self._cls, + self._attrs, + frozen=self._frozen, + cache_hash=self._cache_hash, + ) + + def attach_hash(cls_dict: dict, locs: dict) -> None: + cls_dict["__hash__"] = self._add_method_dunders(locs["__hash__"]) + + self._script_snippets.append((script, globs, attach_hash)) + + return self + + def add_init(self): + script, globs, annotations = _make_init_script( + self._cls, + self._attrs, + self._has_pre_init, + self._pre_init_has_args, + self._has_post_init, + self._frozen, + self._slots, + self._cache_hash, + self._base_attr_map, + self._is_exc, + self._on_setattr, + attrs_init=False, + ) + + def _attach_init(cls_dict, globs): + init = globs["__init__"] + init.__annotations__ = annotations + cls_dict["__init__"] = self._add_method_dunders(init) + + self._script_snippets.append((script, globs, _attach_init)) + + return self + + def add_replace(self): + self._cls_dict["__replace__"] = self._add_method_dunders( + lambda self, **changes: evolve(self, **changes) + ) + return self + + def add_match_args(self): + self._cls_dict["__match_args__"] = tuple( + field.name + for field in self._attrs + if field.init and not field.kw_only + ) + + def add_attrs_init(self): + script, globs, annotations = _make_init_script( + self._cls, + self._attrs, + self._has_pre_init, + self._pre_init_has_args, + self._has_post_init, + self._frozen, + self._slots, + self._cache_hash, + self._base_attr_map, + self._is_exc, + self._on_setattr, + attrs_init=True, + ) + + def _attach_attrs_init(cls_dict, globs): + init = globs["__attrs_init__"] + init.__annotations__ = annotations + cls_dict["__attrs_init__"] = self._add_method_dunders(init) + + self._script_snippets.append((script, globs, _attach_attrs_init)) + + return self + + def add_eq(self): + cd = self._cls_dict + + script, globs = _make_eq_script(self._attrs) + + def _attach_eq(cls_dict, globs): + cls_dict["__eq__"] = self._add_method_dunders(globs["__eq__"]) + + self._script_snippets.append((script, globs, _attach_eq)) + + cd["__ne__"] = __ne__ + + return self + + def add_order(self): + cd = self._cls_dict + + cd["__lt__"], cd["__le__"], cd["__gt__"], cd["__ge__"] = ( + self._add_method_dunders(meth) + for meth in _make_order(self._cls, self._attrs) + ) + + return self + + def add_setattr(self): + sa_attrs = {} + for a in self._attrs: + on_setattr = a.on_setattr or self._on_setattr + if on_setattr and on_setattr is not setters.NO_OP: + sa_attrs[a.name] = a, on_setattr + + if not sa_attrs: + return self + + if self._has_custom_setattr: + # We need to write a __setattr__ but there already is one! + msg = "Can't combine custom __setattr__ with on_setattr hooks." + raise ValueError(msg) + + # docstring comes from _add_method_dunders + def __setattr__(self, name, val): + try: + a, hook = sa_attrs[name] + except KeyError: + nval = val + else: + nval = hook(self, a, val) + + _OBJ_SETATTR(self, name, nval) + + self._cls_dict["__attrs_own_setattr__"] = True + self._cls_dict["__setattr__"] = self._add_method_dunders(__setattr__) + self._wrote_own_setattr = True + + return self + + def _add_method_dunders_unsafe(self, method: Callable) -> Callable: + """ + Add __module__ and __qualname__ to a *method*. + """ + method.__module__ = self._cls.__module__ + + method.__qualname__ = f"{self._cls.__qualname__}.{method.__name__}" + + method.__doc__ = ( + f"Method generated by attrs for class {self._cls.__qualname__}." + ) + + return method + + def _add_method_dunders_safe(self, method: Callable) -> Callable: + """ + Add __module__ and __qualname__ to a *method* if possible. + """ + with contextlib.suppress(AttributeError): + method.__module__ = self._cls.__module__ + + with contextlib.suppress(AttributeError): + method.__qualname__ = f"{self._cls.__qualname__}.{method.__name__}" + + with contextlib.suppress(AttributeError): + method.__doc__ = f"Method generated by attrs for class {self._cls.__qualname__}." + + return method + + +def _determine_attrs_eq_order(cmp, eq, order, default_eq): + """ + Validate the combination of *cmp*, *eq*, and *order*. Derive the effective + values of eq and order. If *eq* is None, set it to *default_eq*. + """ + if cmp is not None and any((eq is not None, order is not None)): + msg = "Don't mix `cmp` with `eq' and `order`." + raise ValueError(msg) + + # cmp takes precedence due to bw-compatibility. + if cmp is not None: + return cmp, cmp + + # If left None, equality is set to the specified default and ordering + # mirrors equality. + if eq is None: + eq = default_eq + + if order is None: + order = eq + + if eq is False and order is True: + msg = "`order` can only be True if `eq` is True too." + raise ValueError(msg) + + return eq, order + + +def _determine_attrib_eq_order(cmp, eq, order, default_eq): + """ + Validate the combination of *cmp*, *eq*, and *order*. Derive the effective + values of eq and order. If *eq* is None, set it to *default_eq*. + """ + if cmp is not None and any((eq is not None, order is not None)): + msg = "Don't mix `cmp` with `eq' and `order`." + raise ValueError(msg) + + def decide_callable_or_boolean(value): + """ + Decide whether a key function is used. + """ + if callable(value): + value, key = True, value + else: + key = None + return value, key + + # cmp takes precedence due to bw-compatibility. + if cmp is not None: + cmp, cmp_key = decide_callable_or_boolean(cmp) + return cmp, cmp_key, cmp, cmp_key + + # If left None, equality is set to the specified default and ordering + # mirrors equality. + if eq is None: + eq, eq_key = default_eq, None + else: + eq, eq_key = decide_callable_or_boolean(eq) + + if order is None: + order, order_key = eq, eq_key + else: + order, order_key = decide_callable_or_boolean(order) + + if eq is False and order is True: + msg = "`order` can only be True if `eq` is True too." + raise ValueError(msg) + + return eq, eq_key, order, order_key + + +def _determine_whether_to_implement( + cls, flag, auto_detect, dunders, default=True +): + """ + Check whether we should implement a set of methods for *cls*. + + *flag* is the argument passed into @attr.s like 'init', *auto_detect* the + same as passed into @attr.s and *dunders* is a tuple of attribute names + whose presence signal that the user has implemented it themselves. + + Return *default* if no reason for either for or against is found. + """ + if flag is True or flag is False: + return flag + + if flag is None and auto_detect is False: + return default + + # Logically, flag is None and auto_detect is True here. + for dunder in dunders: + if _has_own_attribute(cls, dunder): + return False + + return default + + +def attrs( + maybe_cls=None, + these=None, + repr_ns=None, + repr=None, + cmp=None, + hash=None, + init=None, + slots=False, + frozen=False, + weakref_slot=True, + str=False, + auto_attribs=False, + kw_only=False, + cache_hash=False, + auto_exc=False, + eq=None, + order=None, + auto_detect=False, + collect_by_mro=False, + getstate_setstate=None, + on_setattr=None, + field_transformer=None, + match_args=True, + unsafe_hash=None, +): + r""" + A class decorator that adds :term:`dunder methods` according to the + specified attributes using `attr.ib` or the *these* argument. + + Consider using `attrs.define` / `attrs.frozen` in new code (``attr.s`` will + *never* go away, though). + + Args: + repr_ns (str): + When using nested classes, there was no way in Python 2 to + automatically detect that. This argument allows to set a custom + name for a more meaningful ``repr`` output. This argument is + pointless in Python 3 and is therefore deprecated. + + .. caution:: + Refer to `attrs.define` for the rest of the parameters, but note that they + can have different defaults. + + Notably, leaving *on_setattr* as `None` will **not** add any hooks. + + .. versionadded:: 16.0.0 *slots* + .. versionadded:: 16.1.0 *frozen* + .. versionadded:: 16.3.0 *str* + .. versionadded:: 16.3.0 Support for ``__attrs_post_init__``. + .. versionchanged:: 17.1.0 + *hash* supports `None` as value which is also the default now. + .. versionadded:: 17.3.0 *auto_attribs* + .. versionchanged:: 18.1.0 + If *these* is passed, no attributes are deleted from the class body. + .. versionchanged:: 18.1.0 If *these* is ordered, the order is retained. + .. versionadded:: 18.2.0 *weakref_slot* + .. deprecated:: 18.2.0 + ``__lt__``, ``__le__``, ``__gt__``, and ``__ge__`` now raise a + `DeprecationWarning` if the classes compared are subclasses of + each other. ``__eq`` and ``__ne__`` never tried to compared subclasses + to each other. + .. versionchanged:: 19.2.0 + ``__lt__``, ``__le__``, ``__gt__``, and ``__ge__`` now do not consider + subclasses comparable anymore. + .. versionadded:: 18.2.0 *kw_only* + .. versionadded:: 18.2.0 *cache_hash* + .. versionadded:: 19.1.0 *auto_exc* + .. deprecated:: 19.2.0 *cmp* Removal on or after 2021-06-01. + .. versionadded:: 19.2.0 *eq* and *order* + .. versionadded:: 20.1.0 *auto_detect* + .. versionadded:: 20.1.0 *collect_by_mro* + .. versionadded:: 20.1.0 *getstate_setstate* + .. versionadded:: 20.1.0 *on_setattr* + .. versionadded:: 20.3.0 *field_transformer* + .. versionchanged:: 21.1.0 + ``init=False`` injects ``__attrs_init__`` + .. versionchanged:: 21.1.0 Support for ``__attrs_pre_init__`` + .. versionchanged:: 21.1.0 *cmp* undeprecated + .. versionadded:: 21.3.0 *match_args* + .. versionadded:: 22.2.0 + *unsafe_hash* as an alias for *hash* (for :pep:`681` compliance). + .. deprecated:: 24.1.0 *repr_ns* + .. versionchanged:: 24.1.0 + Instances are not compared as tuples of attributes anymore, but using a + big ``and`` condition. This is faster and has more correct behavior for + uncomparable values like `math.nan`. + .. versionadded:: 24.1.0 + If a class has an *inherited* classmethod called + ``__attrs_init_subclass__``, it is executed after the class is created. + .. deprecated:: 24.1.0 *hash* is deprecated in favor of *unsafe_hash*. + """ + if repr_ns is not None: + import warnings + + warnings.warn( + DeprecationWarning( + "The `repr_ns` argument is deprecated and will be removed in or after August 2025." + ), + stacklevel=2, + ) + + eq_, order_ = _determine_attrs_eq_order(cmp, eq, order, None) + + # unsafe_hash takes precedence due to PEP 681. + if unsafe_hash is not None: + hash = unsafe_hash + + if isinstance(on_setattr, (list, tuple)): + on_setattr = setters.pipe(*on_setattr) + + def wrap(cls): + is_frozen = frozen or _has_frozen_base_class(cls) + is_exc = auto_exc is True and issubclass(cls, BaseException) + has_own_setattr = auto_detect and _has_own_attribute( + cls, "__setattr__" + ) + + if has_own_setattr and is_frozen: + msg = "Can't freeze a class with a custom __setattr__." + raise ValueError(msg) + + builder = _ClassBuilder( + cls, + these, + slots, + is_frozen, + weakref_slot, + _determine_whether_to_implement( + cls, + getstate_setstate, + auto_detect, + ("__getstate__", "__setstate__"), + default=slots, + ), + auto_attribs, + kw_only, + cache_hash, + is_exc, + collect_by_mro, + on_setattr, + has_own_setattr, + field_transformer, + ) + + if _determine_whether_to_implement( + cls, repr, auto_detect, ("__repr__",) + ): + builder.add_repr(repr_ns) + + if str is True: + builder.add_str() + + eq = _determine_whether_to_implement( + cls, eq_, auto_detect, ("__eq__", "__ne__") + ) + if not is_exc and eq is True: + builder.add_eq() + if not is_exc and _determine_whether_to_implement( + cls, order_, auto_detect, ("__lt__", "__le__", "__gt__", "__ge__") + ): + builder.add_order() + + if not frozen: + builder.add_setattr() + + nonlocal hash + if ( + hash is None + and auto_detect is True + and _has_own_attribute(cls, "__hash__") + ): + hash = False + + if hash is not True and hash is not False and hash is not None: + # Can't use `hash in` because 1 == True for example. + msg = "Invalid value for hash. Must be True, False, or None." + raise TypeError(msg) + + if hash is False or (hash is None and eq is False) or is_exc: + # Don't do anything. Should fall back to __object__'s __hash__ + # which is by id. + if cache_hash: + msg = "Invalid value for cache_hash. To use hash caching, hashing must be either explicitly or implicitly enabled." + raise TypeError(msg) + elif hash is True or ( + hash is None and eq is True and is_frozen is True + ): + # Build a __hash__ if told so, or if it's safe. + builder.add_hash() + else: + # Raise TypeError on attempts to hash. + if cache_hash: + msg = "Invalid value for cache_hash. To use hash caching, hashing must be either explicitly or implicitly enabled." + raise TypeError(msg) + builder.make_unhashable() + + if _determine_whether_to_implement( + cls, init, auto_detect, ("__init__",) + ): + builder.add_init() + else: + builder.add_attrs_init() + if cache_hash: + msg = "Invalid value for cache_hash. To use hash caching, init must be True." + raise TypeError(msg) + + if PY_3_13_PLUS and not _has_own_attribute(cls, "__replace__"): + builder.add_replace() + + if ( + PY_3_10_PLUS + and match_args + and not _has_own_attribute(cls, "__match_args__") + ): + builder.add_match_args() + + return builder.build_class() + + # maybe_cls's type depends on the usage of the decorator. It's a class + # if it's used as `@attrs` but `None` if used as `@attrs()`. + if maybe_cls is None: + return wrap + + return wrap(maybe_cls) + + +_attrs = attrs +""" +Internal alias so we can use it in functions that take an argument called +*attrs*. +""" + + +def _has_frozen_base_class(cls): + """ + Check whether *cls* has a frozen ancestor by looking at its + __setattr__. + """ + return cls.__setattr__ is _frozen_setattrs + + +def _generate_unique_filename(cls: type, func_name: str) -> str: + """ + Create a "filename" suitable for a function being generated. + """ + return ( + f"<attrs generated {func_name} {cls.__module__}." + f"{getattr(cls, '__qualname__', cls.__name__)}>" + ) + + +def _make_hash_script( + cls: type, attrs: list[Attribute], frozen: bool, cache_hash: bool +) -> tuple[str, dict]: + attrs = tuple( + a for a in attrs if a.hash is True or (a.hash is None and a.eq is True) + ) + + tab = " " + + type_hash = hash(_generate_unique_filename(cls, "hash")) + # If eq is custom generated, we need to include the functions in globs + globs = {} + + hash_def = "def __hash__(self" + hash_func = "hash((" + closing_braces = "))" + if not cache_hash: + hash_def += "):" + else: + hash_def += ", *" + + hash_def += ", _cache_wrapper=__import__('attr._make')._make._CacheHashWrapper):" + hash_func = "_cache_wrapper(" + hash_func + closing_braces += ")" + + method_lines = [hash_def] + + def append_hash_computation_lines(prefix, indent): + """ + Generate the code for actually computing the hash code. + Below this will either be returned directly or used to compute + a value which is then cached, depending on the value of cache_hash + """ + + method_lines.extend( + [ + indent + prefix + hash_func, + indent + f" {type_hash},", + ] + ) + + for a in attrs: + if a.eq_key: + cmp_name = f"_{a.name}_key" + globs[cmp_name] = a.eq_key + method_lines.append( + indent + f" {cmp_name}(self.{a.name})," + ) + else: + method_lines.append(indent + f" self.{a.name},") + + method_lines.append(indent + " " + closing_braces) + + if cache_hash: + method_lines.append(tab + f"if self.{_HASH_CACHE_FIELD} is None:") + if frozen: + append_hash_computation_lines( + f"object.__setattr__(self, '{_HASH_CACHE_FIELD}', ", tab * 2 + ) + method_lines.append(tab * 2 + ")") # close __setattr__ + else: + append_hash_computation_lines( + f"self.{_HASH_CACHE_FIELD} = ", tab * 2 + ) + method_lines.append(tab + f"return self.{_HASH_CACHE_FIELD}") + else: + append_hash_computation_lines("return ", tab) + + script = "\n".join(method_lines) + return script, globs + + +def _add_hash(cls: type, attrs: list[Attribute]): + """ + Add a hash method to *cls*. + """ + script, globs = _make_hash_script( + cls, attrs, frozen=False, cache_hash=False + ) + _compile_and_eval( + script, globs, filename=_generate_unique_filename(cls, "__hash__") + ) + cls.__hash__ = globs["__hash__"] + return cls + + +def __ne__(self, other): + """ + Check equality and either forward a NotImplemented or + return the result negated. + """ + result = self.__eq__(other) + if result is NotImplemented: + return NotImplemented + + return not result + + +def _make_eq_script(attrs: list) -> tuple[str, dict]: + """ + Create __eq__ method for *cls* with *attrs*. + """ + attrs = [a for a in attrs if a.eq] + + lines = [ + "def __eq__(self, other):", + " if other.__class__ is not self.__class__:", + " return NotImplemented", + ] + + globs = {} + if attrs: + lines.append(" return (") + for a in attrs: + if a.eq_key: + cmp_name = f"_{a.name}_key" + # Add the key function to the global namespace + # of the evaluated function. + globs[cmp_name] = a.eq_key + lines.append( + f" {cmp_name}(self.{a.name}) == {cmp_name}(other.{a.name})" + ) + else: + lines.append(f" self.{a.name} == other.{a.name}") + if a is not attrs[-1]: + lines[-1] = f"{lines[-1]} and" + lines.append(" )") + else: + lines.append(" return True") + + script = "\n".join(lines) + + return script, globs + + +def _make_order(cls, attrs): + """ + Create ordering methods for *cls* with *attrs*. + """ + attrs = [a for a in attrs if a.order] + + def attrs_to_tuple(obj): + """ + Save us some typing. + """ + return tuple( + key(value) if key else value + for value, key in ( + (getattr(obj, a.name), a.order_key) for a in attrs + ) + ) + + def __lt__(self, other): + """ + Automatically created by attrs. + """ + if other.__class__ is self.__class__: + return attrs_to_tuple(self) < attrs_to_tuple(other) + + return NotImplemented + + def __le__(self, other): + """ + Automatically created by attrs. + """ + if other.__class__ is self.__class__: + return attrs_to_tuple(self) <= attrs_to_tuple(other) + + return NotImplemented + + def __gt__(self, other): + """ + Automatically created by attrs. + """ + if other.__class__ is self.__class__: + return attrs_to_tuple(self) > attrs_to_tuple(other) + + return NotImplemented + + def __ge__(self, other): + """ + Automatically created by attrs. + """ + if other.__class__ is self.__class__: + return attrs_to_tuple(self) >= attrs_to_tuple(other) + + return NotImplemented + + return __lt__, __le__, __gt__, __ge__ + + +def _add_eq(cls, attrs=None): + """ + Add equality methods to *cls* with *attrs*. + """ + if attrs is None: + attrs = cls.__attrs_attrs__ + + script, globs = _make_eq_script(attrs) + _compile_and_eval( + script, globs, filename=_generate_unique_filename(cls, "__eq__") + ) + cls.__eq__ = globs["__eq__"] + cls.__ne__ = __ne__ + + return cls + + +def _make_repr_script(attrs, ns) -> tuple[str, dict]: + """ + Create the source and globs for a __repr__ and return it. + """ + # Figure out which attributes to include, and which function to use to + # format them. The a.repr value can be either bool or a custom + # callable. + attr_names_with_reprs = tuple( + (a.name, (repr if a.repr is True else a.repr), a.init) + for a in attrs + if a.repr is not False + ) + globs = { + name + "_repr": r for name, r, _ in attr_names_with_reprs if r != repr + } + globs["_compat"] = _compat + globs["AttributeError"] = AttributeError + globs["NOTHING"] = NOTHING + attribute_fragments = [] + for name, r, i in attr_names_with_reprs: + accessor = ( + "self." + name if i else 'getattr(self, "' + name + '", NOTHING)' + ) + fragment = ( + "%s={%s!r}" % (name, accessor) + if r == repr + else "%s={%s_repr(%s)}" % (name, name, accessor) + ) + attribute_fragments.append(fragment) + repr_fragment = ", ".join(attribute_fragments) + + if ns is None: + cls_name_fragment = '{self.__class__.__qualname__.rsplit(">.", 1)[-1]}' + else: + cls_name_fragment = ns + ".{self.__class__.__name__}" + + lines = [ + "def __repr__(self):", + " try:", + " already_repring = _compat.repr_context.already_repring", + " except AttributeError:", + " already_repring = {id(self),}", + " _compat.repr_context.already_repring = already_repring", + " else:", + " if id(self) in already_repring:", + " return '...'", + " else:", + " already_repring.add(id(self))", + " try:", + f" return f'{cls_name_fragment}({repr_fragment})'", + " finally:", + " already_repring.remove(id(self))", + ] + + return "\n".join(lines), globs + + +def _add_repr(cls, ns=None, attrs=None): + """ + Add a repr method to *cls*. + """ + if attrs is None: + attrs = cls.__attrs_attrs__ + + script, globs = _make_repr_script(attrs, ns) + _compile_and_eval( + script, globs, filename=_generate_unique_filename(cls, "__repr__") + ) + cls.__repr__ = globs["__repr__"] + return cls + + +def fields(cls): + """ + Return the tuple of *attrs* attributes for a class. + + The tuple also allows accessing the fields by their names (see below for + examples). + + Args: + cls (type): Class to introspect. + + Raises: + TypeError: If *cls* is not a class. + + attrs.exceptions.NotAnAttrsClassError: + If *cls* is not an *attrs* class. + + Returns: + tuple (with name accessors) of `attrs.Attribute` + + .. versionchanged:: 16.2.0 Returned tuple allows accessing the fields + by name. + .. versionchanged:: 23.1.0 Add support for generic classes. + """ + generic_base = get_generic_base(cls) + + if generic_base is None and not isinstance(cls, type): + msg = "Passed object must be a class." + raise TypeError(msg) + + attrs = getattr(cls, "__attrs_attrs__", None) + + if attrs is None: + if generic_base is not None: + attrs = getattr(generic_base, "__attrs_attrs__", None) + if attrs is not None: + # Even though this is global state, stick it on here to speed + # it up. We rely on `cls` being cached for this to be + # efficient. + cls.__attrs_attrs__ = attrs + return attrs + msg = f"{cls!r} is not an attrs-decorated class." + raise NotAnAttrsClassError(msg) + + return attrs + + +def fields_dict(cls): + """ + Return an ordered dictionary of *attrs* attributes for a class, whose keys + are the attribute names. + + Args: + cls (type): Class to introspect. + + Raises: + TypeError: If *cls* is not a class. + + attrs.exceptions.NotAnAttrsClassError: + If *cls* is not an *attrs* class. + + Returns: + dict[str, attrs.Attribute]: Dict of attribute name to definition + + .. versionadded:: 18.1.0 + """ + if not isinstance(cls, type): + msg = "Passed object must be a class." + raise TypeError(msg) + attrs = getattr(cls, "__attrs_attrs__", None) + if attrs is None: + msg = f"{cls!r} is not an attrs-decorated class." + raise NotAnAttrsClassError(msg) + return {a.name: a for a in attrs} + + +def validate(inst): + """ + Validate all attributes on *inst* that have a validator. + + Leaves all exceptions through. + + Args: + inst: Instance of a class with *attrs* attributes. + """ + if _config._run_validators is False: + return + + for a in fields(inst.__class__): + v = a.validator + if v is not None: + v(inst, a, getattr(inst, a.name)) + + +def _is_slot_attr(a_name, base_attr_map): + """ + Check if the attribute name comes from a slot class. + """ + cls = base_attr_map.get(a_name) + return cls and "__slots__" in cls.__dict__ + + +def _make_init_script( + cls, + attrs, + pre_init, + pre_init_has_args, + post_init, + frozen, + slots, + cache_hash, + base_attr_map, + is_exc, + cls_on_setattr, + attrs_init, +) -> tuple[str, dict, dict]: + has_cls_on_setattr = ( + cls_on_setattr is not None and cls_on_setattr is not setters.NO_OP + ) + + if frozen and has_cls_on_setattr: + msg = "Frozen classes can't use on_setattr." + raise ValueError(msg) + + needs_cached_setattr = cache_hash or frozen + filtered_attrs = [] + attr_dict = {} + for a in attrs: + if not a.init and a.default is NOTHING: + continue + + filtered_attrs.append(a) + attr_dict[a.name] = a + + if a.on_setattr is not None: + if frozen is True: + msg = "Frozen classes can't use on_setattr." + raise ValueError(msg) + + needs_cached_setattr = True + elif has_cls_on_setattr and a.on_setattr is not setters.NO_OP: + needs_cached_setattr = True + + script, globs, annotations = _attrs_to_init_script( + filtered_attrs, + frozen, + slots, + pre_init, + pre_init_has_args, + post_init, + cache_hash, + base_attr_map, + is_exc, + needs_cached_setattr, + has_cls_on_setattr, + "__attrs_init__" if attrs_init else "__init__", + ) + if cls.__module__ in sys.modules: + # This makes typing.get_type_hints(CLS.__init__) resolve string types. + globs.update(sys.modules[cls.__module__].__dict__) + + globs.update({"NOTHING": NOTHING, "attr_dict": attr_dict}) + + if needs_cached_setattr: + # Save the lookup overhead in __init__ if we need to circumvent + # setattr hooks. + globs["_cached_setattr_get"] = _OBJ_SETATTR.__get__ + + return script, globs, annotations + + +def _setattr(attr_name: str, value_var: str, has_on_setattr: bool) -> str: + """ + Use the cached object.setattr to set *attr_name* to *value_var*. + """ + return f"_setattr('{attr_name}', {value_var})" + + +def _setattr_with_converter( + attr_name: str, value_var: str, has_on_setattr: bool, converter: Converter +) -> str: + """ + Use the cached object.setattr to set *attr_name* to *value_var*, but run + its converter first. + """ + return f"_setattr('{attr_name}', {converter._fmt_converter_call(attr_name, value_var)})" + + +def _assign(attr_name: str, value: str, has_on_setattr: bool) -> str: + """ + Unless *attr_name* has an on_setattr hook, use normal assignment. Otherwise + relegate to _setattr. + """ + if has_on_setattr: + return _setattr(attr_name, value, True) + + return f"self.{attr_name} = {value}" + + +def _assign_with_converter( + attr_name: str, value_var: str, has_on_setattr: bool, converter: Converter +) -> str: + """ + Unless *attr_name* has an on_setattr hook, use normal assignment after + conversion. Otherwise relegate to _setattr_with_converter. + """ + if has_on_setattr: + return _setattr_with_converter(attr_name, value_var, True, converter) + + return f"self.{attr_name} = {converter._fmt_converter_call(attr_name, value_var)}" + + +def _determine_setters( + frozen: bool, slots: bool, base_attr_map: dict[str, type] +): + """ + Determine the correct setter functions based on whether a class is frozen + and/or slotted. + """ + if frozen is True: + if slots is True: + return (), _setattr, _setattr_with_converter + + # Dict frozen classes assign directly to __dict__. + # But only if the attribute doesn't come from an ancestor slot + # class. + # Note _inst_dict will be used again below if cache_hash is True + + def fmt_setter( + attr_name: str, value_var: str, has_on_setattr: bool + ) -> str: + if _is_slot_attr(attr_name, base_attr_map): + return _setattr(attr_name, value_var, has_on_setattr) + + return f"_inst_dict['{attr_name}'] = {value_var}" + + def fmt_setter_with_converter( + attr_name: str, + value_var: str, + has_on_setattr: bool, + converter: Converter, + ) -> str: + if has_on_setattr or _is_slot_attr(attr_name, base_attr_map): + return _setattr_with_converter( + attr_name, value_var, has_on_setattr, converter + ) + + return f"_inst_dict['{attr_name}'] = {converter._fmt_converter_call(attr_name, value_var)}" + + return ( + ("_inst_dict = self.__dict__",), + fmt_setter, + fmt_setter_with_converter, + ) + + # Not frozen -- we can just assign directly. + return (), _assign, _assign_with_converter + + +def _attrs_to_init_script( + attrs: list[Attribute], + is_frozen: bool, + is_slotted: bool, + call_pre_init: bool, + pre_init_has_args: bool, + call_post_init: bool, + does_cache_hash: bool, + base_attr_map: dict[str, type], + is_exc: bool, + needs_cached_setattr: bool, + has_cls_on_setattr: bool, + method_name: str, +) -> tuple[str, dict, dict]: + """ + Return a script of an initializer for *attrs*, a dict of globals, and + annotations for the initializer. + + The globals are required by the generated script. + """ + lines = ["self.__attrs_pre_init__()"] if call_pre_init else [] + + if needs_cached_setattr: + lines.append( + # Circumvent the __setattr__ descriptor to save one lookup per + # assignment. Note _setattr will be used again below if + # does_cache_hash is True. + "_setattr = _cached_setattr_get(self)" + ) + + extra_lines, fmt_setter, fmt_setter_with_converter = _determine_setters( + is_frozen, is_slotted, base_attr_map + ) + lines.extend(extra_lines) + + args = [] + kw_only_args = [] + attrs_to_validate = [] + + # This is a dictionary of names to validator and converter callables. + # Injecting this into __init__ globals lets us avoid lookups. + names_for_globals = {} + annotations = {"return": None} + + for a in attrs: + if a.validator: + attrs_to_validate.append(a) + + attr_name = a.name + has_on_setattr = a.on_setattr is not None or ( + a.on_setattr is not setters.NO_OP and has_cls_on_setattr + ) + # a.alias is set to maybe-mangled attr_name in _ClassBuilder if not + # explicitly provided + arg_name = a.alias + + has_factory = isinstance(a.default, Factory) + maybe_self = "self" if has_factory and a.default.takes_self else "" + + if a.converter is not None and not isinstance(a.converter, Converter): + converter = Converter(a.converter) + else: + converter = a.converter + + if a.init is False: + if has_factory: + init_factory_name = _INIT_FACTORY_PAT % (a.name,) + if converter is not None: + lines.append( + fmt_setter_with_converter( + attr_name, + init_factory_name + f"({maybe_self})", + has_on_setattr, + converter, + ) + ) + names_for_globals[converter._get_global_name(a.name)] = ( + converter.converter + ) + else: + lines.append( + fmt_setter( + attr_name, + init_factory_name + f"({maybe_self})", + has_on_setattr, + ) + ) + names_for_globals[init_factory_name] = a.default.factory + elif converter is not None: + lines.append( + fmt_setter_with_converter( + attr_name, + f"attr_dict['{attr_name}'].default", + has_on_setattr, + converter, + ) + ) + names_for_globals[converter._get_global_name(a.name)] = ( + converter.converter + ) + else: + lines.append( + fmt_setter( + attr_name, + f"attr_dict['{attr_name}'].default", + has_on_setattr, + ) + ) + elif a.default is not NOTHING and not has_factory: + arg = f"{arg_name}=attr_dict['{attr_name}'].default" + if a.kw_only: + kw_only_args.append(arg) + else: + args.append(arg) + + if converter is not None: + lines.append( + fmt_setter_with_converter( + attr_name, arg_name, has_on_setattr, converter + ) + ) + names_for_globals[converter._get_global_name(a.name)] = ( + converter.converter + ) + else: + lines.append(fmt_setter(attr_name, arg_name, has_on_setattr)) + + elif has_factory: + arg = f"{arg_name}=NOTHING" + if a.kw_only: + kw_only_args.append(arg) + else: + args.append(arg) + lines.append(f"if {arg_name} is not NOTHING:") + + init_factory_name = _INIT_FACTORY_PAT % (a.name,) + if converter is not None: + lines.append( + " " + + fmt_setter_with_converter( + attr_name, arg_name, has_on_setattr, converter + ) + ) + lines.append("else:") + lines.append( + " " + + fmt_setter_with_converter( + attr_name, + init_factory_name + "(" + maybe_self + ")", + has_on_setattr, + converter, + ) + ) + names_for_globals[converter._get_global_name(a.name)] = ( + converter.converter + ) + else: + lines.append( + " " + fmt_setter(attr_name, arg_name, has_on_setattr) + ) + lines.append("else:") + lines.append( + " " + + fmt_setter( + attr_name, + init_factory_name + "(" + maybe_self + ")", + has_on_setattr, + ) + ) + names_for_globals[init_factory_name] = a.default.factory + else: + if a.kw_only: + kw_only_args.append(arg_name) + else: + args.append(arg_name) + + if converter is not None: + lines.append( + fmt_setter_with_converter( + attr_name, arg_name, has_on_setattr, converter + ) + ) + names_for_globals[converter._get_global_name(a.name)] = ( + converter.converter + ) + else: + lines.append(fmt_setter(attr_name, arg_name, has_on_setattr)) + + if a.init is True: + if a.type is not None and converter is None: + annotations[arg_name] = a.type + elif converter is not None and converter._first_param_type: + # Use the type from the converter if present. + annotations[arg_name] = converter._first_param_type + + if attrs_to_validate: # we can skip this if there are no validators. + names_for_globals["_config"] = _config + lines.append("if _config._run_validators is True:") + for a in attrs_to_validate: + val_name = "__attr_validator_" + a.name + attr_name = "__attr_" + a.name + lines.append(f" {val_name}(self, {attr_name}, self.{a.name})") + names_for_globals[val_name] = a.validator + names_for_globals[attr_name] = a + + if call_post_init: + lines.append("self.__attrs_post_init__()") + + # Because this is set only after __attrs_post_init__ is called, a crash + # will result if post-init tries to access the hash code. This seemed + # preferable to setting this beforehand, in which case alteration to field + # values during post-init combined with post-init accessing the hash code + # would result in silent bugs. + if does_cache_hash: + if is_frozen: + if is_slotted: + init_hash_cache = f"_setattr('{_HASH_CACHE_FIELD}', None)" + else: + init_hash_cache = f"_inst_dict['{_HASH_CACHE_FIELD}'] = None" + else: + init_hash_cache = f"self.{_HASH_CACHE_FIELD} = None" + lines.append(init_hash_cache) + + # For exceptions we rely on BaseException.__init__ for proper + # initialization. + if is_exc: + vals = ",".join(f"self.{a.name}" for a in attrs if a.init) + + lines.append(f"BaseException.__init__(self, {vals})") + + args = ", ".join(args) + pre_init_args = args + if kw_only_args: + # leading comma & kw_only args + args += f"{', ' if args else ''}*, {', '.join(kw_only_args)}" + pre_init_kw_only_args = ", ".join( + [ + f"{kw_arg_name}={kw_arg_name}" + # We need to remove the defaults from the kw_only_args. + for kw_arg_name in (kwa.split("=")[0] for kwa in kw_only_args) + ] + ) + pre_init_args += ", " if pre_init_args else "" + pre_init_args += pre_init_kw_only_args + + if call_pre_init and pre_init_has_args: + # If pre init method has arguments, pass same arguments as `__init__`. + lines[0] = f"self.__attrs_pre_init__({pre_init_args})" + + # Python <3.12 doesn't allow backslashes in f-strings. + NL = "\n " + return ( + f"""def {method_name}(self, {args}): + {NL.join(lines) if lines else "pass"} +""", + names_for_globals, + annotations, + ) + + +def _default_init_alias_for(name: str) -> str: + """ + The default __init__ parameter name for a field. + + This performs private-name adjustment via leading-unscore stripping, + and is the default value of Attribute.alias if not provided. + """ + + return name.lstrip("_") + + +class Attribute: + """ + *Read-only* representation of an attribute. + + .. warning:: + + You should never instantiate this class yourself. + + The class has *all* arguments of `attr.ib` (except for ``factory`` which is + only syntactic sugar for ``default=Factory(...)`` plus the following: + + - ``name`` (`str`): The name of the attribute. + - ``alias`` (`str`): The __init__ parameter name of the attribute, after + any explicit overrides and default private-attribute-name handling. + - ``inherited`` (`bool`): Whether or not that attribute has been inherited + from a base class. + - ``eq_key`` and ``order_key`` (`typing.Callable` or `None`): The + callables that are used for comparing and ordering objects by this + attribute, respectively. These are set by passing a callable to + `attr.ib`'s ``eq``, ``order``, or ``cmp`` arguments. See also + :ref:`comparison customization <custom-comparison>`. + + Instances of this class are frequently used for introspection purposes + like: + + - `fields` returns a tuple of them. + - Validators get them passed as the first argument. + - The :ref:`field transformer <transform-fields>` hook receives a list of + them. + - The ``alias`` property exposes the __init__ parameter name of the field, + with any overrides and default private-attribute handling applied. + + + .. versionadded:: 20.1.0 *inherited* + .. versionadded:: 20.1.0 *on_setattr* + .. versionchanged:: 20.2.0 *inherited* is not taken into account for + equality checks and hashing anymore. + .. versionadded:: 21.1.0 *eq_key* and *order_key* + .. versionadded:: 22.2.0 *alias* + + For the full version history of the fields, see `attr.ib`. + """ + + # These slots must NOT be reordered because we use them later for + # instantiation. + __slots__ = ( # noqa: RUF023 + "name", + "default", + "validator", + "repr", + "eq", + "eq_key", + "order", + "order_key", + "hash", + "init", + "metadata", + "type", + "converter", + "kw_only", + "inherited", + "on_setattr", + "alias", + ) + + def __init__( + self, + name, + default, + validator, + repr, + cmp, # XXX: unused, remove along with other cmp code. + hash, + init, + inherited, + metadata=None, + type=None, + converter=None, + kw_only=False, + eq=None, + eq_key=None, + order=None, + order_key=None, + on_setattr=None, + alias=None, + ): + eq, eq_key, order, order_key = _determine_attrib_eq_order( + cmp, eq_key or eq, order_key or order, True + ) + + # Cache this descriptor here to speed things up later. + bound_setattr = _OBJ_SETATTR.__get__(self) + + # Despite the big red warning, people *do* instantiate `Attribute` + # themselves. + bound_setattr("name", name) + bound_setattr("default", default) + bound_setattr("validator", validator) + bound_setattr("repr", repr) + bound_setattr("eq", eq) + bound_setattr("eq_key", eq_key) + bound_setattr("order", order) + bound_setattr("order_key", order_key) + bound_setattr("hash", hash) + bound_setattr("init", init) + bound_setattr("converter", converter) + bound_setattr( + "metadata", + ( + types.MappingProxyType(dict(metadata)) # Shallow copy + if metadata + else _EMPTY_METADATA_SINGLETON + ), + ) + bound_setattr("type", type) + bound_setattr("kw_only", kw_only) + bound_setattr("inherited", inherited) + bound_setattr("on_setattr", on_setattr) + bound_setattr("alias", alias) + + def __setattr__(self, name, value): + raise FrozenInstanceError + + @classmethod + def from_counting_attr(cls, name: str, ca: _CountingAttr, type=None): + # type holds the annotated value. deal with conflicts: + if type is None: + type = ca.type + elif ca.type is not None: + msg = f"Type annotation and type argument cannot both be present for '{name}'." + raise ValueError(msg) + return cls( + name, + ca._default, + ca._validator, + ca.repr, + None, + ca.hash, + ca.init, + False, + ca.metadata, + type, + ca.converter, + ca.kw_only, + ca.eq, + ca.eq_key, + ca.order, + ca.order_key, + ca.on_setattr, + ca.alias, + ) + + # Don't use attrs.evolve since fields(Attribute) doesn't work + def evolve(self, **changes): + """ + Copy *self* and apply *changes*. + + This works similarly to `attrs.evolve` but that function does not work + with :class:`attrs.Attribute`. + + It is mainly meant to be used for `transform-fields`. + + .. versionadded:: 20.3.0 + """ + new = copy.copy(self) + + new._setattrs(changes.items()) + + return new + + # Don't use _add_pickle since fields(Attribute) doesn't work + def __getstate__(self): + """ + Play nice with pickle. + """ + return tuple( + getattr(self, name) if name != "metadata" else dict(self.metadata) + for name in self.__slots__ + ) + + def __setstate__(self, state): + """ + Play nice with pickle. + """ + self._setattrs(zip(self.__slots__, state)) + + def _setattrs(self, name_values_pairs): + bound_setattr = _OBJ_SETATTR.__get__(self) + for name, value in name_values_pairs: + if name != "metadata": + bound_setattr(name, value) + else: + bound_setattr( + name, + ( + types.MappingProxyType(dict(value)) + if value + else _EMPTY_METADATA_SINGLETON + ), + ) + + +_a = [ + Attribute( + name=name, + default=NOTHING, + validator=None, + repr=True, + cmp=None, + eq=True, + order=False, + hash=(name != "metadata"), + init=True, + inherited=False, + alias=_default_init_alias_for(name), + ) + for name in Attribute.__slots__ +] + +Attribute = _add_hash( + _add_eq( + _add_repr(Attribute, attrs=_a), + attrs=[a for a in _a if a.name != "inherited"], + ), + attrs=[a for a in _a if a.hash and a.name != "inherited"], +) + + +class _CountingAttr: + """ + Intermediate representation of attributes that uses a counter to preserve + the order in which the attributes have been defined. + + *Internal* data structure of the attrs library. Running into is most + likely the result of a bug like a forgotten `@attr.s` decorator. + """ + + __slots__ = ( + "_default", + "_validator", + "alias", + "converter", + "counter", + "eq", + "eq_key", + "hash", + "init", + "kw_only", + "metadata", + "on_setattr", + "order", + "order_key", + "repr", + "type", + ) + __attrs_attrs__ = ( + *tuple( + Attribute( + name=name, + alias=_default_init_alias_for(name), + default=NOTHING, + validator=None, + repr=True, + cmp=None, + hash=True, + init=True, + kw_only=False, + eq=True, + eq_key=None, + order=False, + order_key=None, + inherited=False, + on_setattr=None, + ) + for name in ( + "counter", + "_default", + "repr", + "eq", + "order", + "hash", + "init", + "on_setattr", + "alias", + ) + ), + Attribute( + name="metadata", + alias="metadata", + default=None, + validator=None, + repr=True, + cmp=None, + hash=False, + init=True, + kw_only=False, + eq=True, + eq_key=None, + order=False, + order_key=None, + inherited=False, + on_setattr=None, + ), + ) + cls_counter = 0 + + def __init__( + self, + default, + validator, + repr, + cmp, + hash, + init, + converter, + metadata, + type, + kw_only, + eq, + eq_key, + order, + order_key, + on_setattr, + alias, + ): + _CountingAttr.cls_counter += 1 + self.counter = _CountingAttr.cls_counter + self._default = default + self._validator = validator + self.converter = converter + self.repr = repr + self.eq = eq + self.eq_key = eq_key + self.order = order + self.order_key = order_key + self.hash = hash + self.init = init + self.metadata = metadata + self.type = type + self.kw_only = kw_only + self.on_setattr = on_setattr + self.alias = alias + + def validator(self, meth): + """ + Decorator that adds *meth* to the list of validators. + + Returns *meth* unchanged. + + .. versionadded:: 17.1.0 + """ + if self._validator is None: + self._validator = meth + else: + self._validator = and_(self._validator, meth) + return meth + + def default(self, meth): + """ + Decorator that allows to set the default for an attribute. + + Returns *meth* unchanged. + + Raises: + DefaultAlreadySetError: If default has been set before. + + .. versionadded:: 17.1.0 + """ + if self._default is not NOTHING: + raise DefaultAlreadySetError + + self._default = Factory(meth, takes_self=True) + + return meth + + +_CountingAttr = _add_eq(_add_repr(_CountingAttr)) + + +class Factory: + """ + Stores a factory callable. + + If passed as the default value to `attrs.field`, the factory is used to + generate a new value. + + Args: + factory (typing.Callable): + A callable that takes either none or exactly one mandatory + positional argument depending on *takes_self*. + + takes_self (bool): + Pass the partially initialized instance that is being initialized + as a positional argument. + + .. versionadded:: 17.1.0 *takes_self* + """ + + __slots__ = ("factory", "takes_self") + + def __init__(self, factory, takes_self=False): + self.factory = factory + self.takes_self = takes_self + + def __getstate__(self): + """ + Play nice with pickle. + """ + return tuple(getattr(self, name) for name in self.__slots__) + + def __setstate__(self, state): + """ + Play nice with pickle. + """ + for name, value in zip(self.__slots__, state): + setattr(self, name, value) + + +_f = [ + Attribute( + name=name, + default=NOTHING, + validator=None, + repr=True, + cmp=None, + eq=True, + order=False, + hash=True, + init=True, + inherited=False, + ) + for name in Factory.__slots__ +] + +Factory = _add_hash(_add_eq(_add_repr(Factory, attrs=_f), attrs=_f), attrs=_f) + + +class Converter: + """ + Stores a converter callable. + + Allows for the wrapped converter to take additional arguments. The + arguments are passed in the order they are documented. + + Args: + converter (Callable): A callable that converts the passed value. + + takes_self (bool): + Pass the partially initialized instance that is being initialized + as a positional argument. (default: `False`) + + takes_field (bool): + Pass the field definition (an :class:`Attribute`) into the + converter as a positional argument. (default: `False`) + + .. versionadded:: 24.1.0 + """ + + __slots__ = ( + "__call__", + "_first_param_type", + "_global_name", + "converter", + "takes_field", + "takes_self", + ) + + def __init__(self, converter, *, takes_self=False, takes_field=False): + self.converter = converter + self.takes_self = takes_self + self.takes_field = takes_field + + ex = _AnnotationExtractor(converter) + self._first_param_type = ex.get_first_param_type() + + if not (self.takes_self or self.takes_field): + self.__call__ = lambda value, _, __: self.converter(value) + elif self.takes_self and not self.takes_field: + self.__call__ = lambda value, instance, __: self.converter( + value, instance + ) + elif not self.takes_self and self.takes_field: + self.__call__ = lambda value, __, field: self.converter( + value, field + ) + else: + self.__call__ = lambda value, instance, field: self.converter( + value, instance, field + ) + + rt = ex.get_return_type() + if rt is not None: + self.__call__.__annotations__["return"] = rt + + @staticmethod + def _get_global_name(attr_name: str) -> str: + """ + Return the name that a converter for an attribute name *attr_name* + would have. + """ + return f"__attr_converter_{attr_name}" + + def _fmt_converter_call(self, attr_name: str, value_var: str) -> str: + """ + Return a string that calls the converter for an attribute name + *attr_name* and the value in variable named *value_var* according to + `self.takes_self` and `self.takes_field`. + """ + if not (self.takes_self or self.takes_field): + return f"{self._get_global_name(attr_name)}({value_var})" + + if self.takes_self and self.takes_field: + return f"{self._get_global_name(attr_name)}({value_var}, self, attr_dict['{attr_name}'])" + + if self.takes_self: + return f"{self._get_global_name(attr_name)}({value_var}, self)" + + return f"{self._get_global_name(attr_name)}({value_var}, attr_dict['{attr_name}'])" + + def __getstate__(self): + """ + Return a dict containing only converter and takes_self -- the rest gets + computed when loading. + """ + return { + "converter": self.converter, + "takes_self": self.takes_self, + "takes_field": self.takes_field, + } + + def __setstate__(self, state): + """ + Load instance from state. + """ + self.__init__(**state) + + +_f = [ + Attribute( + name=name, + default=NOTHING, + validator=None, + repr=True, + cmp=None, + eq=True, + order=False, + hash=True, + init=True, + inherited=False, + ) + for name in ("converter", "takes_self", "takes_field") +] + +Converter = _add_hash( + _add_eq(_add_repr(Converter, attrs=_f), attrs=_f), attrs=_f +) + + +def make_class( + name, attrs, bases=(object,), class_body=None, **attributes_arguments +): + r""" + A quick way to create a new class called *name* with *attrs*. + + .. note:: + + ``make_class()`` is a thin wrapper around `attr.s`, not `attrs.define` + which means that it doesn't come with some of the improved defaults. + + For example, if you want the same ``on_setattr`` behavior as in + `attrs.define`, you have to pass the hooks yourself: ``make_class(..., + on_setattr=setters.pipe(setters.convert, setters.validate)`` + + .. warning:: + + It is *your* duty to ensure that the class name and the attribute names + are valid identifiers. ``make_class()`` will *not* validate them for + you. + + Args: + name (str): The name for the new class. + + attrs (list | dict): + A list of names or a dictionary of mappings of names to `attr.ib`\ + s / `attrs.field`\ s. + + The order is deduced from the order of the names or attributes + inside *attrs*. Otherwise the order of the definition of the + attributes is used. + + bases (tuple[type, ...]): Classes that the new class will subclass. + + class_body (dict): + An optional dictionary of class attributes for the new class. + + attributes_arguments: Passed unmodified to `attr.s`. + + Returns: + type: A new class with *attrs*. + + .. versionadded:: 17.1.0 *bases* + .. versionchanged:: 18.1.0 If *attrs* is ordered, the order is retained. + .. versionchanged:: 23.2.0 *class_body* + .. versionchanged:: 25.2.0 Class names can now be unicode. + """ + # Class identifiers are converted into the normal form NFKC while parsing + name = unicodedata.normalize("NFKC", name) + + if isinstance(attrs, dict): + cls_dict = attrs + elif isinstance(attrs, (list, tuple)): + cls_dict = {a: attrib() for a in attrs} + else: + msg = "attrs argument must be a dict or a list." + raise TypeError(msg) + + pre_init = cls_dict.pop("__attrs_pre_init__", None) + post_init = cls_dict.pop("__attrs_post_init__", None) + user_init = cls_dict.pop("__init__", None) + + body = {} + if class_body is not None: + body.update(class_body) + if pre_init is not None: + body["__attrs_pre_init__"] = pre_init + if post_init is not None: + body["__attrs_post_init__"] = post_init + if user_init is not None: + body["__init__"] = user_init + + type_ = types.new_class(name, bases, {}, lambda ns: ns.update(body)) + + # For pickling to work, the __module__ variable needs to be set to the + # frame where the class is created. Bypass this step in environments where + # sys._getframe is not defined (Jython for example) or sys._getframe is not + # defined for arguments greater than 0 (IronPython). + with contextlib.suppress(AttributeError, ValueError): + type_.__module__ = sys._getframe(1).f_globals.get( + "__name__", "__main__" + ) + + # We do it here for proper warnings with meaningful stacklevel. + cmp = attributes_arguments.pop("cmp", None) + ( + attributes_arguments["eq"], + attributes_arguments["order"], + ) = _determine_attrs_eq_order( + cmp, + attributes_arguments.get("eq"), + attributes_arguments.get("order"), + True, + ) + + cls = _attrs(these=cls_dict, **attributes_arguments)(type_) + # Only add type annotations now or "_attrs()" will complain: + cls.__annotations__ = { + k: v.type for k, v in cls_dict.items() if v.type is not None + } + return cls + + +# These are required by within this module so we define them here and merely +# import into .validators / .converters. + + +@attrs(slots=True, unsafe_hash=True) +class _AndValidator: + """ + Compose many validators to a single one. + """ + + _validators = attrib() + + def __call__(self, inst, attr, value): + for v in self._validators: + v(inst, attr, value) + + +def and_(*validators): + """ + A validator that composes multiple validators into one. + + When called on a value, it runs all wrapped validators. + + Args: + validators (~collections.abc.Iterable[typing.Callable]): + Arbitrary number of validators. + + .. versionadded:: 17.1.0 + """ + vals = [] + for validator in validators: + vals.extend( + validator._validators + if isinstance(validator, _AndValidator) + else [validator] + ) + + return _AndValidator(tuple(vals)) + + +def pipe(*converters): + """ + A converter that composes multiple converters into one. + + When called on a value, it runs all wrapped converters, returning the + *last* value. + + Type annotations will be inferred from the wrapped converters', if they + have any. + + converters (~collections.abc.Iterable[typing.Callable]): + Arbitrary number of converters. + + .. versionadded:: 20.1.0 + """ + + return_instance = any(isinstance(c, Converter) for c in converters) + + if return_instance: + + def pipe_converter(val, inst, field): + for c in converters: + val = ( + c(val, inst, field) if isinstance(c, Converter) else c(val) + ) + + return val + + else: + + def pipe_converter(val): + for c in converters: + val = c(val) + + return val + + if not converters: + # If the converter list is empty, pipe_converter is the identity. + A = TypeVar("A") + pipe_converter.__annotations__.update({"val": A, "return": A}) + else: + # Get parameter type from first converter. + t = _AnnotationExtractor(converters[0]).get_first_param_type() + if t: + pipe_converter.__annotations__["val"] = t + + last = converters[-1] + if not PY_3_11_PLUS and isinstance(last, Converter): + last = last.__call__ + + # Get return type from last converter. + rt = _AnnotationExtractor(last).get_return_type() + if rt: + pipe_converter.__annotations__["return"] = rt + + if return_instance: + return Converter(pipe_converter, takes_self=True, takes_field=True) + return pipe_converter diff --git a/.venv/lib/python3.12/site-packages/attr/_next_gen.py b/.venv/lib/python3.12/site-packages/attr/_next_gen.py new file mode 100644 index 00000000..9290664b --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_next_gen.py @@ -0,0 +1,623 @@ +# SPDX-License-Identifier: MIT + +""" +These are keyword-only APIs that call `attr.s` and `attr.ib` with different +default values. +""" + +from functools import partial + +from . import setters +from ._funcs import asdict as _asdict +from ._funcs import astuple as _astuple +from ._make import ( + _DEFAULT_ON_SETATTR, + NOTHING, + _frozen_setattrs, + attrib, + attrs, +) +from .exceptions import UnannotatedAttributeError + + +def define( + maybe_cls=None, + *, + these=None, + repr=None, + unsafe_hash=None, + hash=None, + init=None, + slots=True, + frozen=False, + weakref_slot=True, + str=False, + auto_attribs=None, + kw_only=False, + cache_hash=False, + auto_exc=True, + eq=None, + order=False, + auto_detect=True, + getstate_setstate=None, + on_setattr=None, + field_transformer=None, + match_args=True, +): + r""" + A class decorator that adds :term:`dunder methods` according to + :term:`fields <field>` specified using :doc:`type annotations <types>`, + `field()` calls, or the *these* argument. + + Since *attrs* patches or replaces an existing class, you cannot use + `object.__init_subclass__` with *attrs* classes, because it runs too early. + As a replacement, you can define ``__attrs_init_subclass__`` on your class. + It will be called by *attrs* classes that subclass it after they're + created. See also :ref:`init-subclass`. + + Args: + slots (bool): + Create a :term:`slotted class <slotted classes>` that's more + memory-efficient. Slotted classes are generally superior to the + default dict classes, but have some gotchas you should know about, + so we encourage you to read the :term:`glossary entry <slotted + classes>`. + + auto_detect (bool): + Instead of setting the *init*, *repr*, *eq*, and *hash* arguments + explicitly, assume they are set to True **unless any** of the + involved methods for one of the arguments is implemented in the + *current* class (meaning, it is *not* inherited from some base + class). + + So, for example by implementing ``__eq__`` on a class yourself, + *attrs* will deduce ``eq=False`` and will create *neither* + ``__eq__`` *nor* ``__ne__`` (but Python classes come with a + sensible ``__ne__`` by default, so it *should* be enough to only + implement ``__eq__`` in most cases). + + Passing True or False` to *init*, *repr*, *eq*, or *hash* + overrides whatever *auto_detect* would determine. + + auto_exc (bool): + If the class subclasses `BaseException` (which implicitly includes + any subclass of any exception), the following happens to behave + like a well-behaved Python exception class: + + - the values for *eq*, *order*, and *hash* are ignored and the + instances compare and hash by the instance's ids [#]_ , + - all attributes that are either passed into ``__init__`` or have a + default value are additionally available as a tuple in the + ``args`` attribute, + - the value of *str* is ignored leaving ``__str__`` to base + classes. + + .. [#] + Note that *attrs* will *not* remove existing implementations of + ``__hash__`` or the equality methods. It just won't add own + ones. + + on_setattr (~typing.Callable | list[~typing.Callable] | None | ~typing.Literal[attrs.setters.NO_OP]): + A callable that is run whenever the user attempts to set an + attribute (either by assignment like ``i.x = 42`` or by using + `setattr` like ``setattr(i, "x", 42)``). It receives the same + arguments as validators: the instance, the attribute that is being + modified, and the new value. + + If no exception is raised, the attribute is set to the return value + of the callable. + + If a list of callables is passed, they're automatically wrapped in + an `attrs.setters.pipe`. + + If left None, the default behavior is to run converters and + validators whenever an attribute is set. + + init (bool): + Create a ``__init__`` method that initializes the *attrs* + attributes. Leading underscores are stripped for the argument name, + unless an alias is set on the attribute. + + .. seealso:: + `init` shows advanced ways to customize the generated + ``__init__`` method, including executing code before and after. + + repr(bool): + Create a ``__repr__`` method with a human readable representation + of *attrs* attributes. + + str (bool): + Create a ``__str__`` method that is identical to ``__repr__``. This + is usually not necessary except for `Exception`\ s. + + eq (bool | None): + If True or None (default), add ``__eq__`` and ``__ne__`` methods + that check two instances for equality. + + .. seealso:: + `comparison` describes how to customize the comparison behavior + going as far comparing NumPy arrays. + + order (bool | None): + If True, add ``__lt__``, ``__le__``, ``__gt__``, and ``__ge__`` + methods that behave like *eq* above and allow instances to be + ordered. + + They compare the instances as if they were tuples of their *attrs* + attributes if and only if the types of both classes are + *identical*. + + If `None` mirror value of *eq*. + + .. seealso:: `comparison` + + unsafe_hash (bool | None): + If None (default), the ``__hash__`` method is generated according + how *eq* and *frozen* are set. + + 1. If *both* are True, *attrs* will generate a ``__hash__`` for + you. + 2. If *eq* is True and *frozen* is False, ``__hash__`` will be set + to None, marking it unhashable (which it is). + 3. If *eq* is False, ``__hash__`` will be left untouched meaning + the ``__hash__`` method of the base class will be used. If the + base class is `object`, this means it will fall back to id-based + hashing. + + Although not recommended, you can decide for yourself and force + *attrs* to create one (for example, if the class is immutable even + though you didn't freeze it programmatically) by passing True or + not. Both of these cases are rather special and should be used + carefully. + + .. seealso:: + + - Our documentation on `hashing`, + - Python's documentation on `object.__hash__`, + - and the `GitHub issue that led to the default \ behavior + <https://github.com/python-attrs/attrs/issues/136>`_ for more + details. + + hash (bool | None): + Deprecated alias for *unsafe_hash*. *unsafe_hash* takes precedence. + + cache_hash (bool): + Ensure that the object's hash code is computed only once and stored + on the object. If this is set to True, hashing must be either + explicitly or implicitly enabled for this class. If the hash code + is cached, avoid any reassignments of fields involved in hash code + computation or mutations of the objects those fields point to after + object creation. If such changes occur, the behavior of the + object's hash code is undefined. + + frozen (bool): + Make instances immutable after initialization. If someone attempts + to modify a frozen instance, `attrs.exceptions.FrozenInstanceError` + is raised. + + .. note:: + + 1. This is achieved by installing a custom ``__setattr__`` + method on your class, so you can't implement your own. + + 2. True immutability is impossible in Python. + + 3. This *does* have a minor a runtime performance `impact + <how-frozen>` when initializing new instances. In other + words: ``__init__`` is slightly slower with ``frozen=True``. + + 4. If a class is frozen, you cannot modify ``self`` in + ``__attrs_post_init__`` or a self-written ``__init__``. You + can circumvent that limitation by using + ``object.__setattr__(self, "attribute_name", value)``. + + 5. Subclasses of a frozen class are frozen too. + + kw_only (bool): + Make all attributes keyword-only in the generated ``__init__`` (if + *init* is False, this parameter is ignored). + + weakref_slot (bool): + Make instances weak-referenceable. This has no effect unless + *slots* is True. + + field_transformer (~typing.Callable | None): + A function that is called with the original class object and all + fields right before *attrs* finalizes the class. You can use this, + for example, to automatically add converters or validators to + fields based on their types. + + .. seealso:: `transform-fields` + + match_args (bool): + If True (default), set ``__match_args__`` on the class to support + :pep:`634` (*Structural Pattern Matching*). It is a tuple of all + non-keyword-only ``__init__`` parameter names on Python 3.10 and + later. Ignored on older Python versions. + + collect_by_mro (bool): + If True, *attrs* collects attributes from base classes correctly + according to the `method resolution order + <https://docs.python.org/3/howto/mro.html>`_. If False, *attrs* + will mimic the (wrong) behavior of `dataclasses` and :pep:`681`. + + See also `issue #428 + <https://github.com/python-attrs/attrs/issues/428>`_. + + getstate_setstate (bool | None): + .. note:: + + This is usually only interesting for slotted classes and you + should probably just set *auto_detect* to True. + + If True, ``__getstate__`` and ``__setstate__`` are generated and + attached to the class. This is necessary for slotted classes to be + pickleable. If left None, it's True by default for slotted classes + and False for dict classes. + + If *auto_detect* is True, and *getstate_setstate* is left None, and + **either** ``__getstate__`` or ``__setstate__`` is detected + directly on the class (meaning: not inherited), it is set to False + (this is usually what you want). + + auto_attribs (bool | None): + If True, look at type annotations to determine which attributes to + use, like `dataclasses`. If False, it will only look for explicit + :func:`field` class attributes, like classic *attrs*. + + If left None, it will guess: + + 1. If any attributes are annotated and no unannotated + `attrs.field`\ s are found, it assumes *auto_attribs=True*. + 2. Otherwise it assumes *auto_attribs=False* and tries to collect + `attrs.field`\ s. + + If *attrs* decides to look at type annotations, **all** fields + **must** be annotated. If *attrs* encounters a field that is set to + a :func:`field` / `attr.ib` but lacks a type annotation, an + `attrs.exceptions.UnannotatedAttributeError` is raised. Use + ``field_name: typing.Any = field(...)`` if you don't want to set a + type. + + .. warning:: + + For features that use the attribute name to create decorators + (for example, :ref:`validators <validators>`), you still *must* + assign :func:`field` / `attr.ib` to them. Otherwise Python will + either not find the name or try to use the default value to + call, for example, ``validator`` on it. + + Attributes annotated as `typing.ClassVar`, and attributes that are + neither annotated nor set to an `field()` are **ignored**. + + these (dict[str, object]): + A dictionary of name to the (private) return value of `field()` + mappings. This is useful to avoid the definition of your attributes + within the class body because you can't (for example, if you want + to add ``__repr__`` methods to Django models) or don't want to. + + If *these* is not `None`, *attrs* will *not* search the class body + for attributes and will *not* remove any attributes from it. + + The order is deduced from the order of the attributes inside + *these*. + + Arguably, this is a rather obscure feature. + + .. versionadded:: 20.1.0 + .. versionchanged:: 21.3.0 Converters are also run ``on_setattr``. + .. versionadded:: 22.2.0 + *unsafe_hash* as an alias for *hash* (for :pep:`681` compliance). + .. versionchanged:: 24.1.0 + Instances are not compared as tuples of attributes anymore, but using a + big ``and`` condition. This is faster and has more correct behavior for + uncomparable values like `math.nan`. + .. versionadded:: 24.1.0 + If a class has an *inherited* classmethod called + ``__attrs_init_subclass__``, it is executed after the class is created. + .. deprecated:: 24.1.0 *hash* is deprecated in favor of *unsafe_hash*. + .. versionadded:: 24.3.0 + Unless already present, a ``__replace__`` method is automatically + created for `copy.replace` (Python 3.13+ only). + + .. note:: + + The main differences to the classic `attr.s` are: + + - Automatically detect whether or not *auto_attribs* should be `True` + (c.f. *auto_attribs* parameter). + - Converters and validators run when attributes are set by default -- + if *frozen* is `False`. + - *slots=True* + + Usually, this has only upsides and few visible effects in everyday + programming. But it *can* lead to some surprising behaviors, so + please make sure to read :term:`slotted classes`. + + - *auto_exc=True* + - *auto_detect=True* + - *order=False* + - Some options that were only relevant on Python 2 or were kept around + for backwards-compatibility have been removed. + + """ + + def do_it(cls, auto_attribs): + return attrs( + maybe_cls=cls, + these=these, + repr=repr, + hash=hash, + unsafe_hash=unsafe_hash, + init=init, + slots=slots, + frozen=frozen, + weakref_slot=weakref_slot, + str=str, + auto_attribs=auto_attribs, + kw_only=kw_only, + cache_hash=cache_hash, + auto_exc=auto_exc, + eq=eq, + order=order, + auto_detect=auto_detect, + collect_by_mro=True, + getstate_setstate=getstate_setstate, + on_setattr=on_setattr, + field_transformer=field_transformer, + match_args=match_args, + ) + + def wrap(cls): + """ + Making this a wrapper ensures this code runs during class creation. + + We also ensure that frozen-ness of classes is inherited. + """ + nonlocal frozen, on_setattr + + had_on_setattr = on_setattr not in (None, setters.NO_OP) + + # By default, mutable classes convert & validate on setattr. + if frozen is False and on_setattr is None: + on_setattr = _DEFAULT_ON_SETATTR + + # However, if we subclass a frozen class, we inherit the immutability + # and disable on_setattr. + for base_cls in cls.__bases__: + if base_cls.__setattr__ is _frozen_setattrs: + if had_on_setattr: + msg = "Frozen classes can't use on_setattr (frozen-ness was inherited)." + raise ValueError(msg) + + on_setattr = setters.NO_OP + break + + if auto_attribs is not None: + return do_it(cls, auto_attribs) + + try: + return do_it(cls, True) + except UnannotatedAttributeError: + return do_it(cls, False) + + # maybe_cls's type depends on the usage of the decorator. It's a class + # if it's used as `@attrs` but `None` if used as `@attrs()`. + if maybe_cls is None: + return wrap + + return wrap(maybe_cls) + + +mutable = define +frozen = partial(define, frozen=True, on_setattr=None) + + +def field( + *, + default=NOTHING, + validator=None, + repr=True, + hash=None, + init=True, + metadata=None, + type=None, + converter=None, + factory=None, + kw_only=False, + eq=None, + order=None, + on_setattr=None, + alias=None, +): + """ + Create a new :term:`field` / :term:`attribute` on a class. + + .. warning:: + + Does **nothing** unless the class is also decorated with + `attrs.define` (or similar)! + + Args: + default: + A value that is used if an *attrs*-generated ``__init__`` is used + and no value is passed while instantiating or the attribute is + excluded using ``init=False``. + + If the value is an instance of `attrs.Factory`, its callable will + be used to construct a new value (useful for mutable data types + like lists or dicts). + + If a default is not set (or set manually to `attrs.NOTHING`), a + value *must* be supplied when instantiating; otherwise a + `TypeError` will be raised. + + .. seealso:: `defaults` + + factory (~typing.Callable): + Syntactic sugar for ``default=attr.Factory(factory)``. + + validator (~typing.Callable | list[~typing.Callable]): + Callable that is called by *attrs*-generated ``__init__`` methods + after the instance has been initialized. They receive the + initialized instance, the :func:`~attrs.Attribute`, and the passed + value. + + The return value is *not* inspected so the validator has to throw + an exception itself. + + If a `list` is passed, its items are treated as validators and must + all pass. + + Validators can be globally disabled and re-enabled using + `attrs.validators.get_disabled` / `attrs.validators.set_disabled`. + + The validator can also be set using decorator notation as shown + below. + + .. seealso:: :ref:`validators` + + repr (bool | ~typing.Callable): + Include this attribute in the generated ``__repr__`` method. If + True, include the attribute; if False, omit it. By default, the + built-in ``repr()`` function is used. To override how the attribute + value is formatted, pass a ``callable`` that takes a single value + and returns a string. Note that the resulting string is used as-is, + which means it will be used directly *instead* of calling + ``repr()`` (the default). + + eq (bool | ~typing.Callable): + If True (default), include this attribute in the generated + ``__eq__`` and ``__ne__`` methods that check two instances for + equality. To override how the attribute value is compared, pass a + callable that takes a single value and returns the value to be + compared. + + .. seealso:: `comparison` + + order (bool | ~typing.Callable): + If True (default), include this attributes in the generated + ``__lt__``, ``__le__``, ``__gt__`` and ``__ge__`` methods. To + override how the attribute value is ordered, pass a callable that + takes a single value and returns the value to be ordered. + + .. seealso:: `comparison` + + hash (bool | None): + Include this attribute in the generated ``__hash__`` method. If + None (default), mirror *eq*'s value. This is the correct behavior + according the Python spec. Setting this value to anything else + than None is *discouraged*. + + .. seealso:: `hashing` + + init (bool): + Include this attribute in the generated ``__init__`` method. + + It is possible to set this to False and set a default value. In + that case this attributed is unconditionally initialized with the + specified default value or factory. + + .. seealso:: `init` + + converter (typing.Callable | Converter): + A callable that is called by *attrs*-generated ``__init__`` methods + to convert attribute's value to the desired format. + + If a vanilla callable is passed, it is given the passed-in value as + the only positional argument. It is possible to receive additional + arguments by wrapping the callable in a `Converter`. + + Either way, the returned value will be used as the new value of the + attribute. The value is converted before being passed to the + validator, if any. + + .. seealso:: :ref:`converters` + + metadata (dict | None): + An arbitrary mapping, to be used by third-party code. + + .. seealso:: `extending-metadata`. + + type (type): + The type of the attribute. Nowadays, the preferred method to + specify the type is using a variable annotation (see :pep:`526`). + This argument is provided for backwards-compatibility and for usage + with `make_class`. Regardless of the approach used, the type will + be stored on ``Attribute.type``. + + Please note that *attrs* doesn't do anything with this metadata by + itself. You can use it as part of your own code or for `static type + checking <types>`. + + kw_only (bool): + Make this attribute keyword-only in the generated ``__init__`` (if + ``init`` is False, this parameter is ignored). + + on_setattr (~typing.Callable | list[~typing.Callable] | None | ~typing.Literal[attrs.setters.NO_OP]): + Allows to overwrite the *on_setattr* setting from `attr.s`. If left + None, the *on_setattr* value from `attr.s` is used. Set to + `attrs.setters.NO_OP` to run **no** `setattr` hooks for this + attribute -- regardless of the setting in `define()`. + + alias (str | None): + Override this attribute's parameter name in the generated + ``__init__`` method. If left None, default to ``name`` stripped + of leading underscores. See `private-attributes`. + + .. versionadded:: 20.1.0 + .. versionchanged:: 21.1.0 + *eq*, *order*, and *cmp* also accept a custom callable + .. versionadded:: 22.2.0 *alias* + .. versionadded:: 23.1.0 + The *type* parameter has been re-added; mostly for `attrs.make_class`. + Please note that type checkers ignore this metadata. + + .. seealso:: + + `attr.ib` + """ + return attrib( + default=default, + validator=validator, + repr=repr, + hash=hash, + init=init, + metadata=metadata, + type=type, + converter=converter, + factory=factory, + kw_only=kw_only, + eq=eq, + order=order, + on_setattr=on_setattr, + alias=alias, + ) + + +def asdict(inst, *, recurse=True, filter=None, value_serializer=None): + """ + Same as `attr.asdict`, except that collections types are always retained + and dict is always used as *dict_factory*. + + .. versionadded:: 21.3.0 + """ + return _asdict( + inst=inst, + recurse=recurse, + filter=filter, + value_serializer=value_serializer, + retain_collection_types=True, + ) + + +def astuple(inst, *, recurse=True, filter=None): + """ + Same as `attr.astuple`, except that collections types are always retained + and `tuple` is always used as the *tuple_factory*. + + .. versionadded:: 21.3.0 + """ + return _astuple( + inst=inst, recurse=recurse, filter=filter, retain_collection_types=True + ) diff --git a/.venv/lib/python3.12/site-packages/attr/_typing_compat.pyi b/.venv/lib/python3.12/site-packages/attr/_typing_compat.pyi new file mode 100644 index 00000000..ca7b71e9 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_typing_compat.pyi @@ -0,0 +1,15 @@ +from typing import Any, ClassVar, Protocol + +# MYPY is a special constant in mypy which works the same way as `TYPE_CHECKING`. +MYPY = False + +if MYPY: + # A protocol to be able to statically accept an attrs class. + class AttrsInstance_(Protocol): + __attrs_attrs__: ClassVar[Any] + +else: + # For type checkers without plug-in support use an empty protocol that + # will (hopefully) be combined into a union. + class AttrsInstance_(Protocol): + pass diff --git a/.venv/lib/python3.12/site-packages/attr/_version_info.py b/.venv/lib/python3.12/site-packages/attr/_version_info.py new file mode 100644 index 00000000..51a1312f --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_version_info.py @@ -0,0 +1,86 @@ +# SPDX-License-Identifier: MIT + + +from functools import total_ordering + +from ._funcs import astuple +from ._make import attrib, attrs + + +@total_ordering +@attrs(eq=False, order=False, slots=True, frozen=True) +class VersionInfo: + """ + A version object that can be compared to tuple of length 1--4: + + >>> attr.VersionInfo(19, 1, 0, "final") <= (19, 2) + True + >>> attr.VersionInfo(19, 1, 0, "final") < (19, 1, 1) + True + >>> vi = attr.VersionInfo(19, 2, 0, "final") + >>> vi < (19, 1, 1) + False + >>> vi < (19,) + False + >>> vi == (19, 2,) + True + >>> vi == (19, 2, 1) + False + + .. versionadded:: 19.2 + """ + + year = attrib(type=int) + minor = attrib(type=int) + micro = attrib(type=int) + releaselevel = attrib(type=str) + + @classmethod + def _from_version_string(cls, s): + """ + Parse *s* and return a _VersionInfo. + """ + v = s.split(".") + if len(v) == 3: + v.append("final") + + return cls( + year=int(v[0]), minor=int(v[1]), micro=int(v[2]), releaselevel=v[3] + ) + + def _ensure_tuple(self, other): + """ + Ensure *other* is a tuple of a valid length. + + Returns a possibly transformed *other* and ourselves as a tuple of + the same length as *other*. + """ + + if self.__class__ is other.__class__: + other = astuple(other) + + if not isinstance(other, tuple): + raise NotImplementedError + + if not (1 <= len(other) <= 4): + raise NotImplementedError + + return astuple(self)[: len(other)], other + + def __eq__(self, other): + try: + us, them = self._ensure_tuple(other) + except NotImplementedError: + return NotImplemented + + return us == them + + def __lt__(self, other): + try: + us, them = self._ensure_tuple(other) + except NotImplementedError: + return NotImplemented + + # Since alphabetically "dev0" < "final" < "post1" < "post2", we don't + # have to do anything special with releaselevel for now. + return us < them diff --git a/.venv/lib/python3.12/site-packages/attr/_version_info.pyi b/.venv/lib/python3.12/site-packages/attr/_version_info.pyi new file mode 100644 index 00000000..45ced086 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/_version_info.pyi @@ -0,0 +1,9 @@ +class VersionInfo: + @property + def year(self) -> int: ... + @property + def minor(self) -> int: ... + @property + def micro(self) -> int: ... + @property + def releaselevel(self) -> str: ... diff --git a/.venv/lib/python3.12/site-packages/attr/converters.py b/.venv/lib/python3.12/site-packages/attr/converters.py new file mode 100644 index 00000000..0a79deef --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/converters.py @@ -0,0 +1,162 @@ +# SPDX-License-Identifier: MIT + +""" +Commonly useful converters. +""" + +import typing + +from ._compat import _AnnotationExtractor +from ._make import NOTHING, Converter, Factory, pipe + + +__all__ = [ + "default_if_none", + "optional", + "pipe", + "to_bool", +] + + +def optional(converter): + """ + A converter that allows an attribute to be optional. An optional attribute + is one which can be set to `None`. + + Type annotations will be inferred from the wrapped converter's, if it has + any. + + Args: + converter (typing.Callable): + the converter that is used for non-`None` values. + + .. versionadded:: 17.1.0 + """ + + if isinstance(converter, Converter): + + def optional_converter(val, inst, field): + if val is None: + return None + return converter(val, inst, field) + + else: + + def optional_converter(val): + if val is None: + return None + return converter(val) + + xtr = _AnnotationExtractor(converter) + + t = xtr.get_first_param_type() + if t: + optional_converter.__annotations__["val"] = typing.Optional[t] + + rt = xtr.get_return_type() + if rt: + optional_converter.__annotations__["return"] = typing.Optional[rt] + + if isinstance(converter, Converter): + return Converter(optional_converter, takes_self=True, takes_field=True) + + return optional_converter + + +def default_if_none(default=NOTHING, factory=None): + """ + A converter that allows to replace `None` values by *default* or the result + of *factory*. + + Args: + default: + Value to be used if `None` is passed. Passing an instance of + `attrs.Factory` is supported, however the ``takes_self`` option is + *not*. + + factory (typing.Callable): + A callable that takes no parameters whose result is used if `None` + is passed. + + Raises: + TypeError: If **neither** *default* or *factory* is passed. + + TypeError: If **both** *default* and *factory* are passed. + + ValueError: + If an instance of `attrs.Factory` is passed with + ``takes_self=True``. + + .. versionadded:: 18.2.0 + """ + if default is NOTHING and factory is None: + msg = "Must pass either `default` or `factory`." + raise TypeError(msg) + + if default is not NOTHING and factory is not None: + msg = "Must pass either `default` or `factory` but not both." + raise TypeError(msg) + + if factory is not None: + default = Factory(factory) + + if isinstance(default, Factory): + if default.takes_self: + msg = "`takes_self` is not supported by default_if_none." + raise ValueError(msg) + + def default_if_none_converter(val): + if val is not None: + return val + + return default.factory() + + else: + + def default_if_none_converter(val): + if val is not None: + return val + + return default + + return default_if_none_converter + + +def to_bool(val): + """ + Convert "boolean" strings (for example, from environment variables) to real + booleans. + + Values mapping to `True`: + + - ``True`` + - ``"true"`` / ``"t"`` + - ``"yes"`` / ``"y"`` + - ``"on"`` + - ``"1"`` + - ``1`` + + Values mapping to `False`: + + - ``False`` + - ``"false"`` / ``"f"`` + - ``"no"`` / ``"n"`` + - ``"off"`` + - ``"0"`` + - ``0`` + + Raises: + ValueError: For any other value. + + .. versionadded:: 21.3.0 + """ + if isinstance(val, str): + val = val.lower() + + if val in (True, "true", "t", "yes", "y", "on", "1", 1): + return True + if val in (False, "false", "f", "no", "n", "off", "0", 0): + return False + + msg = f"Cannot convert value to bool: {val!r}" + raise ValueError(msg) diff --git a/.venv/lib/python3.12/site-packages/attr/converters.pyi b/.venv/lib/python3.12/site-packages/attr/converters.pyi new file mode 100644 index 00000000..12bd0c4f --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/converters.pyi @@ -0,0 +1,19 @@ +from typing import Callable, Any, overload + +from attrs import _ConverterType, _CallableConverterType + +@overload +def pipe(*validators: _CallableConverterType) -> _CallableConverterType: ... +@overload +def pipe(*validators: _ConverterType) -> _ConverterType: ... +@overload +def optional(converter: _CallableConverterType) -> _CallableConverterType: ... +@overload +def optional(converter: _ConverterType) -> _ConverterType: ... +@overload +def default_if_none(default: Any) -> _CallableConverterType: ... +@overload +def default_if_none( + *, factory: Callable[[], Any] +) -> _CallableConverterType: ... +def to_bool(val: str | int | bool) -> bool: ... diff --git a/.venv/lib/python3.12/site-packages/attr/exceptions.py b/.venv/lib/python3.12/site-packages/attr/exceptions.py new file mode 100644 index 00000000..3b7abb81 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/exceptions.py @@ -0,0 +1,95 @@ +# SPDX-License-Identifier: MIT + +from __future__ import annotations + +from typing import ClassVar + + +class FrozenError(AttributeError): + """ + A frozen/immutable instance or attribute have been attempted to be + modified. + + It mirrors the behavior of ``namedtuples`` by using the same error message + and subclassing `AttributeError`. + + .. versionadded:: 20.1.0 + """ + + msg = "can't set attribute" + args: ClassVar[tuple[str]] = [msg] + + +class FrozenInstanceError(FrozenError): + """ + A frozen instance has been attempted to be modified. + + .. versionadded:: 16.1.0 + """ + + +class FrozenAttributeError(FrozenError): + """ + A frozen attribute has been attempted to be modified. + + .. versionadded:: 20.1.0 + """ + + +class AttrsAttributeNotFoundError(ValueError): + """ + An *attrs* function couldn't find an attribute that the user asked for. + + .. versionadded:: 16.2.0 + """ + + +class NotAnAttrsClassError(ValueError): + """ + A non-*attrs* class has been passed into an *attrs* function. + + .. versionadded:: 16.2.0 + """ + + +class DefaultAlreadySetError(RuntimeError): + """ + A default has been set when defining the field and is attempted to be reset + using the decorator. + + .. versionadded:: 17.1.0 + """ + + +class UnannotatedAttributeError(RuntimeError): + """ + A class with ``auto_attribs=True`` has a field without a type annotation. + + .. versionadded:: 17.3.0 + """ + + +class PythonTooOldError(RuntimeError): + """ + It was attempted to use an *attrs* feature that requires a newer Python + version. + + .. versionadded:: 18.2.0 + """ + + +class NotCallableError(TypeError): + """ + A field requiring a callable has been set with a value that is not + callable. + + .. versionadded:: 19.2.0 + """ + + def __init__(self, msg, value): + super(TypeError, self).__init__(msg, value) + self.msg = msg + self.value = value + + def __str__(self): + return str(self.msg) diff --git a/.venv/lib/python3.12/site-packages/attr/exceptions.pyi b/.venv/lib/python3.12/site-packages/attr/exceptions.pyi new file mode 100644 index 00000000..f2680118 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/exceptions.pyi @@ -0,0 +1,17 @@ +from typing import Any + +class FrozenError(AttributeError): + msg: str = ... + +class FrozenInstanceError(FrozenError): ... +class FrozenAttributeError(FrozenError): ... +class AttrsAttributeNotFoundError(ValueError): ... +class NotAnAttrsClassError(ValueError): ... +class DefaultAlreadySetError(RuntimeError): ... +class UnannotatedAttributeError(RuntimeError): ... +class PythonTooOldError(RuntimeError): ... + +class NotCallableError(TypeError): + msg: str = ... + value: Any = ... + def __init__(self, msg: str, value: Any) -> None: ... diff --git a/.venv/lib/python3.12/site-packages/attr/filters.py b/.venv/lib/python3.12/site-packages/attr/filters.py new file mode 100644 index 00000000..689b1705 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/filters.py @@ -0,0 +1,72 @@ +# SPDX-License-Identifier: MIT + +""" +Commonly useful filters for `attrs.asdict` and `attrs.astuple`. +""" + +from ._make import Attribute + + +def _split_what(what): + """ + Returns a tuple of `frozenset`s of classes and attributes. + """ + return ( + frozenset(cls for cls in what if isinstance(cls, type)), + frozenset(cls for cls in what if isinstance(cls, str)), + frozenset(cls for cls in what if isinstance(cls, Attribute)), + ) + + +def include(*what): + """ + Create a filter that only allows *what*. + + Args: + what (list[type, str, attrs.Attribute]): + What to include. Can be a type, a name, or an attribute. + + Returns: + Callable: + A callable that can be passed to `attrs.asdict`'s and + `attrs.astuple`'s *filter* argument. + + .. versionchanged:: 23.1.0 Accept strings with field names. + """ + cls, names, attrs = _split_what(what) + + def include_(attribute, value): + return ( + value.__class__ in cls + or attribute.name in names + or attribute in attrs + ) + + return include_ + + +def exclude(*what): + """ + Create a filter that does **not** allow *what*. + + Args: + what (list[type, str, attrs.Attribute]): + What to exclude. Can be a type, a name, or an attribute. + + Returns: + Callable: + A callable that can be passed to `attrs.asdict`'s and + `attrs.astuple`'s *filter* argument. + + .. versionchanged:: 23.3.0 Accept field name string as input argument + """ + cls, names, attrs = _split_what(what) + + def exclude_(attribute, value): + return not ( + value.__class__ in cls + or attribute.name in names + or attribute in attrs + ) + + return exclude_ diff --git a/.venv/lib/python3.12/site-packages/attr/filters.pyi b/.venv/lib/python3.12/site-packages/attr/filters.pyi new file mode 100644 index 00000000..974abdcd --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/filters.pyi @@ -0,0 +1,6 @@ +from typing import Any + +from . import Attribute, _FilterType + +def include(*what: type | str | Attribute[Any]) -> _FilterType[Any]: ... +def exclude(*what: type | str | Attribute[Any]) -> _FilterType[Any]: ... diff --git a/.venv/lib/python3.12/site-packages/attr/py.typed b/.venv/lib/python3.12/site-packages/attr/py.typed new file mode 100644 index 00000000..e69de29b --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/py.typed diff --git a/.venv/lib/python3.12/site-packages/attr/setters.py b/.venv/lib/python3.12/site-packages/attr/setters.py new file mode 100644 index 00000000..78b08398 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/setters.py @@ -0,0 +1,79 @@ +# SPDX-License-Identifier: MIT + +""" +Commonly used hooks for on_setattr. +""" + +from . import _config +from .exceptions import FrozenAttributeError + + +def pipe(*setters): + """ + Run all *setters* and return the return value of the last one. + + .. versionadded:: 20.1.0 + """ + + def wrapped_pipe(instance, attrib, new_value): + rv = new_value + + for setter in setters: + rv = setter(instance, attrib, rv) + + return rv + + return wrapped_pipe + + +def frozen(_, __, ___): + """ + Prevent an attribute to be modified. + + .. versionadded:: 20.1.0 + """ + raise FrozenAttributeError + + +def validate(instance, attrib, new_value): + """ + Run *attrib*'s validator on *new_value* if it has one. + + .. versionadded:: 20.1.0 + """ + if _config._run_validators is False: + return new_value + + v = attrib.validator + if not v: + return new_value + + v(instance, attrib, new_value) + + return new_value + + +def convert(instance, attrib, new_value): + """ + Run *attrib*'s converter -- if it has one -- on *new_value* and return the + result. + + .. versionadded:: 20.1.0 + """ + c = attrib.converter + if c: + # This can be removed once we drop 3.8 and use attrs.Converter instead. + from ._make import Converter + + if not isinstance(c, Converter): + return c(new_value) + + return c(new_value, instance, attrib) + + return new_value + + +# Sentinel for disabling class-wide *on_setattr* hooks for certain attributes. +# Sphinx's autodata stopped working, so the docstring is inlined in the API +# docs. +NO_OP = object() diff --git a/.venv/lib/python3.12/site-packages/attr/setters.pyi b/.venv/lib/python3.12/site-packages/attr/setters.pyi new file mode 100644 index 00000000..73abf36e --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/setters.pyi @@ -0,0 +1,20 @@ +from typing import Any, NewType, NoReturn, TypeVar + +from . import Attribute +from attrs import _OnSetAttrType + +_T = TypeVar("_T") + +def frozen( + instance: Any, attribute: Attribute[Any], new_value: Any +) -> NoReturn: ... +def pipe(*setters: _OnSetAttrType) -> _OnSetAttrType: ... +def validate(instance: Any, attribute: Attribute[_T], new_value: _T) -> _T: ... + +# convert is allowed to return Any, because they can be chained using pipe. +def convert( + instance: Any, attribute: Attribute[Any], new_value: Any +) -> Any: ... + +_NoOpType = NewType("_NoOpType", object) +NO_OP: _NoOpType diff --git a/.venv/lib/python3.12/site-packages/attr/validators.py b/.venv/lib/python3.12/site-packages/attr/validators.py new file mode 100644 index 00000000..e7b75525 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/validators.py @@ -0,0 +1,710 @@ +# SPDX-License-Identifier: MIT + +""" +Commonly useful validators. +""" + +import operator +import re + +from contextlib import contextmanager +from re import Pattern + +from ._config import get_run_validators, set_run_validators +from ._make import _AndValidator, and_, attrib, attrs +from .converters import default_if_none +from .exceptions import NotCallableError + + +__all__ = [ + "and_", + "deep_iterable", + "deep_mapping", + "disabled", + "ge", + "get_disabled", + "gt", + "in_", + "instance_of", + "is_callable", + "le", + "lt", + "matches_re", + "max_len", + "min_len", + "not_", + "optional", + "or_", + "set_disabled", +] + + +def set_disabled(disabled): + """ + Globally disable or enable running validators. + + By default, they are run. + + Args: + disabled (bool): If `True`, disable running all validators. + + .. warning:: + + This function is not thread-safe! + + .. versionadded:: 21.3.0 + """ + set_run_validators(not disabled) + + +def get_disabled(): + """ + Return a bool indicating whether validators are currently disabled or not. + + Returns: + bool:`True` if validators are currently disabled. + + .. versionadded:: 21.3.0 + """ + return not get_run_validators() + + +@contextmanager +def disabled(): + """ + Context manager that disables running validators within its context. + + .. warning:: + + This context manager is not thread-safe! + + .. versionadded:: 21.3.0 + """ + set_run_validators(False) + try: + yield + finally: + set_run_validators(True) + + +@attrs(repr=False, slots=True, unsafe_hash=True) +class _InstanceOfValidator: + type = attrib() + + def __call__(self, inst, attr, value): + """ + We use a callable class to be able to change the ``__repr__``. + """ + if not isinstance(value, self.type): + msg = f"'{attr.name}' must be {self.type!r} (got {value!r} that is a {value.__class__!r})." + raise TypeError( + msg, + attr, + self.type, + value, + ) + + def __repr__(self): + return f"<instance_of validator for type {self.type!r}>" + + +def instance_of(type): + """ + A validator that raises a `TypeError` if the initializer is called with a + wrong type for this particular attribute (checks are performed using + `isinstance` therefore it's also valid to pass a tuple of types). + + Args: + type (type | tuple[type]): The type to check for. + + Raises: + TypeError: + With a human readable error message, the attribute (of type + `attrs.Attribute`), the expected type, and the value it got. + """ + return _InstanceOfValidator(type) + + +@attrs(repr=False, frozen=True, slots=True) +class _MatchesReValidator: + pattern = attrib() + match_func = attrib() + + def __call__(self, inst, attr, value): + """ + We use a callable class to be able to change the ``__repr__``. + """ + if not self.match_func(value): + msg = f"'{attr.name}' must match regex {self.pattern.pattern!r} ({value!r} doesn't)" + raise ValueError( + msg, + attr, + self.pattern, + value, + ) + + def __repr__(self): + return f"<matches_re validator for pattern {self.pattern!r}>" + + +def matches_re(regex, flags=0, func=None): + r""" + A validator that raises `ValueError` if the initializer is called with a + string that doesn't match *regex*. + + Args: + regex (str, re.Pattern): + A regex string or precompiled pattern to match against + + flags (int): + Flags that will be passed to the underlying re function (default 0) + + func (typing.Callable): + Which underlying `re` function to call. Valid options are + `re.fullmatch`, `re.search`, and `re.match`; the default `None` + means `re.fullmatch`. For performance reasons, the pattern is + always precompiled using `re.compile`. + + .. versionadded:: 19.2.0 + .. versionchanged:: 21.3.0 *regex* can be a pre-compiled pattern. + """ + valid_funcs = (re.fullmatch, None, re.search, re.match) + if func not in valid_funcs: + msg = "'func' must be one of {}.".format( + ", ".join( + sorted((e and e.__name__) or "None" for e in set(valid_funcs)) + ) + ) + raise ValueError(msg) + + if isinstance(regex, Pattern): + if flags: + msg = "'flags' can only be used with a string pattern; pass flags to re.compile() instead" + raise TypeError(msg) + pattern = regex + else: + pattern = re.compile(regex, flags) + + if func is re.match: + match_func = pattern.match + elif func is re.search: + match_func = pattern.search + else: + match_func = pattern.fullmatch + + return _MatchesReValidator(pattern, match_func) + + +@attrs(repr=False, slots=True, unsafe_hash=True) +class _OptionalValidator: + validator = attrib() + + def __call__(self, inst, attr, value): + if value is None: + return + + self.validator(inst, attr, value) + + def __repr__(self): + return f"<optional validator for {self.validator!r} or None>" + + +def optional(validator): + """ + A validator that makes an attribute optional. An optional attribute is one + which can be set to `None` in addition to satisfying the requirements of + the sub-validator. + + Args: + validator + (typing.Callable | tuple[typing.Callable] | list[typing.Callable]): + A validator (or validators) that is used for non-`None` values. + + .. versionadded:: 15.1.0 + .. versionchanged:: 17.1.0 *validator* can be a list of validators. + .. versionchanged:: 23.1.0 *validator* can also be a tuple of validators. + """ + if isinstance(validator, (list, tuple)): + return _OptionalValidator(_AndValidator(validator)) + + return _OptionalValidator(validator) + + +@attrs(repr=False, slots=True, unsafe_hash=True) +class _InValidator: + options = attrib() + _original_options = attrib(hash=False) + + def __call__(self, inst, attr, value): + try: + in_options = value in self.options + except TypeError: # e.g. `1 in "abc"` + in_options = False + + if not in_options: + msg = f"'{attr.name}' must be in {self._original_options!r} (got {value!r})" + raise ValueError( + msg, + attr, + self._original_options, + value, + ) + + def __repr__(self): + return f"<in_ validator with options {self._original_options!r}>" + + +def in_(options): + """ + A validator that raises a `ValueError` if the initializer is called with a + value that does not belong in the *options* provided. + + The check is performed using ``value in options``, so *options* has to + support that operation. + + To keep the validator hashable, dicts, lists, and sets are transparently + transformed into a `tuple`. + + Args: + options: Allowed options. + + Raises: + ValueError: + With a human readable error message, the attribute (of type + `attrs.Attribute`), the expected options, and the value it got. + + .. versionadded:: 17.1.0 + .. versionchanged:: 22.1.0 + The ValueError was incomplete until now and only contained the human + readable error message. Now it contains all the information that has + been promised since 17.1.0. + .. versionchanged:: 24.1.0 + *options* that are a list, dict, or a set are now transformed into a + tuple to keep the validator hashable. + """ + repr_options = options + if isinstance(options, (list, dict, set)): + options = tuple(options) + + return _InValidator(options, repr_options) + + +@attrs(repr=False, slots=False, unsafe_hash=True) +class _IsCallableValidator: + def __call__(self, inst, attr, value): + """ + We use a callable class to be able to change the ``__repr__``. + """ + if not callable(value): + message = ( + "'{name}' must be callable " + "(got {value!r} that is a {actual!r})." + ) + raise NotCallableError( + msg=message.format( + name=attr.name, value=value, actual=value.__class__ + ), + value=value, + ) + + def __repr__(self): + return "<is_callable validator>" + + +def is_callable(): + """ + A validator that raises a `attrs.exceptions.NotCallableError` if the + initializer is called with a value for this particular attribute that is + not callable. + + .. versionadded:: 19.1.0 + + Raises: + attrs.exceptions.NotCallableError: + With a human readable error message containing the attribute + (`attrs.Attribute`) name, and the value it got. + """ + return _IsCallableValidator() + + +@attrs(repr=False, slots=True, unsafe_hash=True) +class _DeepIterable: + member_validator = attrib(validator=is_callable()) + iterable_validator = attrib( + default=None, validator=optional(is_callable()) + ) + + def __call__(self, inst, attr, value): + """ + We use a callable class to be able to change the ``__repr__``. + """ + if self.iterable_validator is not None: + self.iterable_validator(inst, attr, value) + + for member in value: + self.member_validator(inst, attr, member) + + def __repr__(self): + iterable_identifier = ( + "" + if self.iterable_validator is None + else f" {self.iterable_validator!r}" + ) + return ( + f"<deep_iterable validator for{iterable_identifier}" + f" iterables of {self.member_validator!r}>" + ) + + +def deep_iterable(member_validator, iterable_validator=None): + """ + A validator that performs deep validation of an iterable. + + Args: + member_validator: Validator to apply to iterable members. + + iterable_validator: + Validator to apply to iterable itself (optional). + + Raises + TypeError: if any sub-validators fail + + .. versionadded:: 19.1.0 + """ + if isinstance(member_validator, (list, tuple)): + member_validator = and_(*member_validator) + return _DeepIterable(member_validator, iterable_validator) + + +@attrs(repr=False, slots=True, unsafe_hash=True) +class _DeepMapping: + key_validator = attrib(validator=is_callable()) + value_validator = attrib(validator=is_callable()) + mapping_validator = attrib(default=None, validator=optional(is_callable())) + + def __call__(self, inst, attr, value): + """ + We use a callable class to be able to change the ``__repr__``. + """ + if self.mapping_validator is not None: + self.mapping_validator(inst, attr, value) + + for key in value: + self.key_validator(inst, attr, key) + self.value_validator(inst, attr, value[key]) + + def __repr__(self): + return f"<deep_mapping validator for objects mapping {self.key_validator!r} to {self.value_validator!r}>" + + +def deep_mapping(key_validator, value_validator, mapping_validator=None): + """ + A validator that performs deep validation of a dictionary. + + Args: + key_validator: Validator to apply to dictionary keys. + + value_validator: Validator to apply to dictionary values. + + mapping_validator: + Validator to apply to top-level mapping attribute (optional). + + .. versionadded:: 19.1.0 + + Raises: + TypeError: if any sub-validators fail + """ + return _DeepMapping(key_validator, value_validator, mapping_validator) + + +@attrs(repr=False, frozen=True, slots=True) +class _NumberValidator: + bound = attrib() + compare_op = attrib() + compare_func = attrib() + + def __call__(self, inst, attr, value): + """ + We use a callable class to be able to change the ``__repr__``. + """ + if not self.compare_func(value, self.bound): + msg = f"'{attr.name}' must be {self.compare_op} {self.bound}: {value}" + raise ValueError(msg) + + def __repr__(self): + return f"<Validator for x {self.compare_op} {self.bound}>" + + +def lt(val): + """ + A validator that raises `ValueError` if the initializer is called with a + number larger or equal to *val*. + + The validator uses `operator.lt` to compare the values. + + Args: + val: Exclusive upper bound for values. + + .. versionadded:: 21.3.0 + """ + return _NumberValidator(val, "<", operator.lt) + + +def le(val): + """ + A validator that raises `ValueError` if the initializer is called with a + number greater than *val*. + + The validator uses `operator.le` to compare the values. + + Args: + val: Inclusive upper bound for values. + + .. versionadded:: 21.3.0 + """ + return _NumberValidator(val, "<=", operator.le) + + +def ge(val): + """ + A validator that raises `ValueError` if the initializer is called with a + number smaller than *val*. + + The validator uses `operator.ge` to compare the values. + + Args: + val: Inclusive lower bound for values + + .. versionadded:: 21.3.0 + """ + return _NumberValidator(val, ">=", operator.ge) + + +def gt(val): + """ + A validator that raises `ValueError` if the initializer is called with a + number smaller or equal to *val*. + + The validator uses `operator.ge` to compare the values. + + Args: + val: Exclusive lower bound for values + + .. versionadded:: 21.3.0 + """ + return _NumberValidator(val, ">", operator.gt) + + +@attrs(repr=False, frozen=True, slots=True) +class _MaxLengthValidator: + max_length = attrib() + + def __call__(self, inst, attr, value): + """ + We use a callable class to be able to change the ``__repr__``. + """ + if len(value) > self.max_length: + msg = f"Length of '{attr.name}' must be <= {self.max_length}: {len(value)}" + raise ValueError(msg) + + def __repr__(self): + return f"<max_len validator for {self.max_length}>" + + +def max_len(length): + """ + A validator that raises `ValueError` if the initializer is called + with a string or iterable that is longer than *length*. + + Args: + length (int): Maximum length of the string or iterable + + .. versionadded:: 21.3.0 + """ + return _MaxLengthValidator(length) + + +@attrs(repr=False, frozen=True, slots=True) +class _MinLengthValidator: + min_length = attrib() + + def __call__(self, inst, attr, value): + """ + We use a callable class to be able to change the ``__repr__``. + """ + if len(value) < self.min_length: + msg = f"Length of '{attr.name}' must be >= {self.min_length}: {len(value)}" + raise ValueError(msg) + + def __repr__(self): + return f"<min_len validator for {self.min_length}>" + + +def min_len(length): + """ + A validator that raises `ValueError` if the initializer is called + with a string or iterable that is shorter than *length*. + + Args: + length (int): Minimum length of the string or iterable + + .. versionadded:: 22.1.0 + """ + return _MinLengthValidator(length) + + +@attrs(repr=False, slots=True, unsafe_hash=True) +class _SubclassOfValidator: + type = attrib() + + def __call__(self, inst, attr, value): + """ + We use a callable class to be able to change the ``__repr__``. + """ + if not issubclass(value, self.type): + msg = f"'{attr.name}' must be a subclass of {self.type!r} (got {value!r})." + raise TypeError( + msg, + attr, + self.type, + value, + ) + + def __repr__(self): + return f"<subclass_of validator for type {self.type!r}>" + + +def _subclass_of(type): + """ + A validator that raises a `TypeError` if the initializer is called with a + wrong type for this particular attribute (checks are performed using + `issubclass` therefore it's also valid to pass a tuple of types). + + Args: + type (type | tuple[type, ...]): The type(s) to check for. + + Raises: + TypeError: + With a human readable error message, the attribute (of type + `attrs.Attribute`), the expected type, and the value it got. + """ + return _SubclassOfValidator(type) + + +@attrs(repr=False, slots=True, unsafe_hash=True) +class _NotValidator: + validator = attrib() + msg = attrib( + converter=default_if_none( + "not_ validator child '{validator!r}' " + "did not raise a captured error" + ) + ) + exc_types = attrib( + validator=deep_iterable( + member_validator=_subclass_of(Exception), + iterable_validator=instance_of(tuple), + ), + ) + + def __call__(self, inst, attr, value): + try: + self.validator(inst, attr, value) + except self.exc_types: + pass # suppress error to invert validity + else: + raise ValueError( + self.msg.format( + validator=self.validator, + exc_types=self.exc_types, + ), + attr, + self.validator, + value, + self.exc_types, + ) + + def __repr__(self): + return f"<not_ validator wrapping {self.validator!r}, capturing {self.exc_types!r}>" + + +def not_(validator, *, msg=None, exc_types=(ValueError, TypeError)): + """ + A validator that wraps and logically 'inverts' the validator passed to it. + It will raise a `ValueError` if the provided validator *doesn't* raise a + `ValueError` or `TypeError` (by default), and will suppress the exception + if the provided validator *does*. + + Intended to be used with existing validators to compose logic without + needing to create inverted variants, for example, ``not_(in_(...))``. + + Args: + validator: A validator to be logically inverted. + + msg (str): + Message to raise if validator fails. Formatted with keys + ``exc_types`` and ``validator``. + + exc_types (tuple[type, ...]): + Exception type(s) to capture. Other types raised by child + validators will not be intercepted and pass through. + + Raises: + ValueError: + With a human readable error message, the attribute (of type + `attrs.Attribute`), the validator that failed to raise an + exception, the value it got, and the expected exception types. + + .. versionadded:: 22.2.0 + """ + try: + exc_types = tuple(exc_types) + except TypeError: + exc_types = (exc_types,) + return _NotValidator(validator, msg, exc_types) + + +@attrs(repr=False, slots=True, unsafe_hash=True) +class _OrValidator: + validators = attrib() + + def __call__(self, inst, attr, value): + for v in self.validators: + try: + v(inst, attr, value) + except Exception: # noqa: BLE001, PERF203, S112 + continue + else: + return + + msg = f"None of {self.validators!r} satisfied for value {value!r}" + raise ValueError(msg) + + def __repr__(self): + return f"<or validator wrapping {self.validators!r}>" + + +def or_(*validators): + """ + A validator that composes multiple validators into one. + + When called on a value, it runs all wrapped validators until one of them is + satisfied. + + Args: + validators (~collections.abc.Iterable[typing.Callable]): + Arbitrary number of validators. + + Raises: + ValueError: + If no validator is satisfied. Raised with a human-readable error + message listing all the wrapped validators and the value that + failed all of them. + + .. versionadded:: 24.1.0 + """ + vals = [] + for v in validators: + vals.extend(v.validators if isinstance(v, _OrValidator) else [v]) + + return _OrValidator(tuple(vals)) diff --git a/.venv/lib/python3.12/site-packages/attr/validators.pyi b/.venv/lib/python3.12/site-packages/attr/validators.pyi new file mode 100644 index 00000000..a0fdda7c --- /dev/null +++ b/.venv/lib/python3.12/site-packages/attr/validators.pyi @@ -0,0 +1,86 @@ +from types import UnionType +from typing import ( + Any, + AnyStr, + Callable, + Container, + ContextManager, + Iterable, + Mapping, + Match, + Pattern, + TypeVar, + overload, +) + +from attrs import _ValidatorType +from attrs import _ValidatorArgType + +_T = TypeVar("_T") +_T1 = TypeVar("_T1") +_T2 = TypeVar("_T2") +_T3 = TypeVar("_T3") +_I = TypeVar("_I", bound=Iterable) +_K = TypeVar("_K") +_V = TypeVar("_V") +_M = TypeVar("_M", bound=Mapping) + +def set_disabled(run: bool) -> None: ... +def get_disabled() -> bool: ... +def disabled() -> ContextManager[None]: ... + +# To be more precise on instance_of use some overloads. +# If there are more than 3 items in the tuple then we fall back to Any +@overload +def instance_of(type: type[_T]) -> _ValidatorType[_T]: ... +@overload +def instance_of(type: tuple[type[_T]]) -> _ValidatorType[_T]: ... +@overload +def instance_of( + type: tuple[type[_T1], type[_T2]], +) -> _ValidatorType[_T1 | _T2]: ... +@overload +def instance_of( + type: tuple[type[_T1], type[_T2], type[_T3]], +) -> _ValidatorType[_T1 | _T2 | _T3]: ... +@overload +def instance_of(type: tuple[type, ...]) -> _ValidatorType[Any]: ... +@overload +def instance_of(type: UnionType) -> _ValidatorType[Any]: ... +def optional( + validator: ( + _ValidatorType[_T] + | list[_ValidatorType[_T]] + | tuple[_ValidatorType[_T]] + ), +) -> _ValidatorType[_T | None]: ... +def in_(options: Container[_T]) -> _ValidatorType[_T]: ... +def and_(*validators: _ValidatorType[_T]) -> _ValidatorType[_T]: ... +def matches_re( + regex: Pattern[AnyStr] | AnyStr, + flags: int = ..., + func: Callable[[AnyStr, AnyStr, int], Match[AnyStr] | None] | None = ..., +) -> _ValidatorType[AnyStr]: ... +def deep_iterable( + member_validator: _ValidatorArgType[_T], + iterable_validator: _ValidatorType[_I] | None = ..., +) -> _ValidatorType[_I]: ... +def deep_mapping( + key_validator: _ValidatorType[_K], + value_validator: _ValidatorType[_V], + mapping_validator: _ValidatorType[_M] | None = ..., +) -> _ValidatorType[_M]: ... +def is_callable() -> _ValidatorType[_T]: ... +def lt(val: _T) -> _ValidatorType[_T]: ... +def le(val: _T) -> _ValidatorType[_T]: ... +def ge(val: _T) -> _ValidatorType[_T]: ... +def gt(val: _T) -> _ValidatorType[_T]: ... +def max_len(length: int) -> _ValidatorType[_T]: ... +def min_len(length: int) -> _ValidatorType[_T]: ... +def not_( + validator: _ValidatorType[_T], + *, + msg: str | None = None, + exc_types: type[Exception] | Iterable[type[Exception]] = ..., +) -> _ValidatorType[_T]: ... +def or_(*validators: _ValidatorType[_T]) -> _ValidatorType[_T]: ... |