"""Defines experimental API for runtime inspection of types defined
in the standard "typing" module.
Example usage::
from typing_inspect import is_generic_type
"""
# NOTE: This module must support Python 2.7 in addition to Python 3.x
import sys
import types
import typing
import typing_extensions
from mypy_extensions import _TypedDictMeta as _TypedDictMeta_Mypy
# See comments in typing_extensions source on why the switch is at 3.9.2
if (3, 4, 0) <= sys.version_info[:3] < (3, 9, 2):
from typing_extensions import _TypedDictMeta as _TypedDictMeta_TE
elif sys.version_info[:3] >= (3, 9, 2):
# Situation with typing_extensions.TypedDict is complicated.
# Use the one defined in typing_extentions, and if there is none,
# fall back to typing.
try:
from typing_extensions import _TypedDictMeta as _TypedDictMeta_TE
except ImportError:
from typing import _TypedDictMeta as _TypedDictMeta_TE
else:
# typing_extensions.TypedDict is a re-export from typing.
from typing import TypedDict
_TypedDictMeta_TE = type(TypedDict)
NEW_TYPING = sys.version_info[:3] >= (3, 7, 0) # PEP 560
if NEW_TYPING:
import collections.abc
WITH_FINAL = True
WITH_LITERAL = True
WITH_CLASSVAR = True
WITH_NEWTYPE = True
LEGACY_TYPING = False
if NEW_TYPING:
from typing import (
Generic, Callable, Union, TypeVar, ClassVar, Tuple, _GenericAlias,
ForwardRef, NewType,
)
from typing_extensions import Final, Literal
if sys.version_info[:3] >= (3, 9, 0):
from typing import _SpecialGenericAlias
typingGenericAlias = (_GenericAlias, _SpecialGenericAlias, types.GenericAlias)
else:
typingGenericAlias = (_GenericAlias,)
else:
from typing import (
Callable, CallableMeta, Union, Tuple, TupleMeta, TypeVar, GenericMeta,
_ForwardRef,
)
try:
from typing import _Union, _ClassVar
except ImportError:
# support for very old typing module <=3.5.3
_Union = type(Union)
WITH_CLASSVAR = False
LEGACY_TYPING = True
try: # python 3.6
from typing_extensions import _Final
except ImportError: # python 2.7
try:
from typing import _Final
except ImportError:
WITH_FINAL = False
try: # python 3.6
from typing_extensions import Literal
except ImportError: # python 2.7
try:
from typing import Literal
except ImportError:
WITH_LITERAL = False
try: # python < 3.5.2
from typing_extensions import NewType
except ImportError:
try:
from typing import NewType
except ImportError:
WITH_NEWTYPE = False
def _gorg(cls):
"""This function exists for compatibility with old typing versions."""
assert isinstance(cls, GenericMeta)
if hasattr(cls, '_gorg'):
return cls._gorg
while cls.__origin__ is not None:
cls = cls.__origin__
return cls
def is_generic_type(tp):
"""Test if the given type is a generic type. This includes Generic itself, but
excludes special typing constructs such as Union, Tuple, Callable, ClassVar.
Examples::
is_generic_type(int) == False
is_generic_type(Union[int, str]) == False
is_generic_type(Union[int, T]) == False
is_generic_type(ClassVar[List[int]]) == False
is_generic_type(Callable[..., T]) == False
is_generic_type(Generic) == True
is_generic_type(Generic[T]) == True
is_generic_type(Iterable[int]) == True
is_generic_type(Mapping) == True
is_generic_type(MutableMapping[T, List[int]]) == True
is_generic_type(Sequence[Union[str, bytes]]) == True
"""
if NEW_TYPING:
return (isinstance(tp, type) and issubclass(tp, Generic) or
isinstance(tp, typingGenericAlias) and
tp.__origin__ not in (Union, tuple, ClassVar, collections.abc.Callable))
return (isinstance(tp, GenericMeta) and not
isinstance(tp, (CallableMeta, TupleMeta)))
def is_callable_type(tp):
"""Test if the type is a generic callable type, including subclasses
excluding non-generic types and callables.
Examples::
is_callable_type(int) == False
is_callable_type(type) == False
is_callable_type(Callable) == True
is_callable_type(Callable[..., int]) == True
is_callable_type(Callable[[int, int], Iterable[str]]) == True
class MyClass(Callable[[int], int]):
...
is_callable_type(MyClass) == True
For more general tests use callable(), for more precise test
(excluding subclasses) use::
get_origin(tp) is collections.abc.Callable # Callable prior to Python 3.7
"""
if NEW_TYPING:
return (tp is Callable or isinstance(tp, typingGenericAlias) and
tp.__origin__ is collections.abc.Callable or
isinstance(tp, type) and issubclass(tp, Generic) and
issubclass(tp, collections.abc.Callable))
return type(tp) is CallableMeta
def is_tuple_type(tp):
"""Test if the type is a generic tuple type, including subclasses excluding
non-generic classes.
Examples::
is_tuple_type(int) == False
is_tuple_type(tuple) == False
is_tuple_type(Tuple) == True
is_tuple_type(Tuple[str, int]) == True
class MyClass(Tuple[str, int]):
...
is_tuple_type(MyClass) == True
For more general tests use issubclass(..., tuple), for more precise test
(excluding subclasses) use::
get_origin(tp) is tuple # Tuple prior to Python 3.7
"""
if NEW_TYPING:
return (tp is Tuple or isinstance(tp, typingGenericAlias) and
tp.__origin__ is tuple or
isinstance(tp, type) and issubclass(tp, Generic) and
issubclass(tp, tuple))
return type(tp) is TupleMeta
def is_optional_type(tp):
"""Test if the type is type(None), or is a direct union with it, such as Optional[T].
NOTE: this method inspects nested `Union` arguments but not `TypeVar` definition
bounds and constraints. So it will return `False` if
- `tp` is a `TypeVar` bound, or constrained to, an optional type
- `tp` is a `Union` to a `TypeVar` bound or constrained to an optional type,
- `tp` refers to a *nested* `Union` containing an optional type or one of the above.
Users wishing to check for optionality in types relying on type variables might wish
to use this method in combination with `get_constraints` and `get_bound`
"""
if tp is type(None): # noqa
return True
elif is_union_type(tp):
return any(is_optional_type(tt) for tt in get_args(tp, evaluate=True))
else:
return False
def is_final_type(tp):
"""Test if the type is a final type. Examples::
is_final_type(int) == False
is_final_type(Final) == True
is_final_type(Final[int]) == True
"""
if NEW_TYPING:
return (tp is Final or
isinstance(tp, typingGenericAlias) and tp.__origin__ is Final)
return WITH_FINAL and type(tp) is _Final
try:
MaybeUnionType = types.UnionType
except AttributeError:
MaybeUnionType = None
def is_union_type(tp):
"""Test if the type is a union type. Examples::
is_union_type(int) == False
is_union_type(Union) == True
is_union_type(Union[int, int]) == False
is_union_type(Union[T, int]) == True
is_union_type(int | int) == False
is_union_type(T | int) == True
"""
if NEW_TYPING:
return (tp is Union or
(isinstance(tp, typingGenericAlias) and tp.__origin__ is Union) or
(MaybeUnionType and isinstance(tp, MaybeUnionType)))
return type(tp) is _Union
LITERALS = {Literal}
if hasattr(typing, "Literal"):
LITERALS.add(typing.Literal)
def is_literal_type(tp):
if NEW_TYPING:
return (tp in LITERALS or
isinstance(tp, typingGenericAlias) and tp.__origin__ in LITERALS)
return WITH_LITERAL and type(tp) is type(Literal)
def is_typevar(tp):
"""Test if the type represents a type variable. Examples::
is_typevar(int) == False
is_typevar(T) == True
is_typevar(Union[T, int]) == False
"""
return type(tp) is TypeVar
def is_classvar(tp):
"""Test if the type represents a class variable. Examples::
is_classvar(int) == False
is_classvar(ClassVar) == True
is_classvar(ClassVar[int]) == True
is_classvar(ClassVar[List[T]]) == True
"""
if NEW_TYPING:
return (tp is ClassVar or
isinstance(tp, typingGenericAlias) and tp.__origin__ is ClassVar)
elif WITH_CLASSVAR:
return type(tp) is _ClassVar
else:
return False
def is_new_type(tp):
"""Tests if the type represents a distinct type. Examples::
is_new_type(int) == False
is_new_type(NewType) == True
is_new_type(NewType('Age', int)) == True
is_new_type(NewType('Scores', List[Dict[str, float]])) == True
"""
if not WITH_NEWTYPE:
return False
elif sys.version_info[:3] >= (3, 10, 0) and sys.version_info.releaselevel != 'beta':
return (tp in (NewType, typing_extensions.NewType) or
isinstance(tp, (NewType, typing_extensions.NewType)))
elif sys.version_info[:3] >= (3, 0, 0):
try:
res = isinstance(tp, typing_extensions.NewType)
except TypeError:
pass
else:
if res:
return res
return (tp in (NewType, typing_extensions.NewType) or
(getattr(tp, '__supertype__', None) is not None and
getattr(tp, '__qualname__', '') == 'NewType.<locals>.new_type' and
tp.__module__ in ('typing', 'typing_extensions')))
else: # python 2
# __qualname__ is not available in python 2, so we simplify the test here
return (tp is NewType or
(getattr(tp, '__supertype__', None) is not None and
tp.__module__ in ('typing', 'typing_extensions')))
def is_forward_ref(tp):
"""Tests if the type is a :class:`typing.ForwardRef`. Examples::
u = Union["Milk", Way]
args = get_args(u)
is_forward_ref(args[0]) == True
is_forward_ref(args[1]) == False
"""
if not NEW_TYPING:
return isinstance(tp, _ForwardRef)
return isinstance(tp, ForwardRef)
def get_last_origin(tp):
"""Get the last base of (multiply) subscripted type. Supports generic types,
Union, Callable, and Tuple. Returns None for unsupported types.
Examples::
get_last_origin(int) == None
get_last_origin(ClassVar[int]) == None
get_last_origin(Generic[T]) == Generic
get_last_origin(Union[T, int][str]) == Union[T, int]
get_last_origin(List[Tuple[T, T]][int]) == List[Tuple[T, T]]
get_last_origin(List) == List
"""
if NEW_TYPING:
raise ValueError('This function is only supported in Python 3.6,'
' use get_origin instead')
sentinel = object()
origin = getattr(tp, '__origin__', sentinel)
if origin is sentinel:
return None
if origin is None:
return tp
return origin
def get_origin(tp):
"""Get the unsubscripted version of a type. Supports generic types, Union,
Callable, and Tuple. Returns None for unsupported types. Examples::
get_origin(int) == None
get_origin(ClassVar[int]) == None
get_origin(Generic) == Generic
get_origin(Generic[T]) == Generic
get_origin(Union[T, int]) == Union
get_origin(List[Tuple[T, T]][int]) == list # List prior to Python 3.7
"""
if NEW_TYPING:
if isinstance(tp, typingGenericAlias):
return tp.__origin__ if tp.__origin__ is not ClassVar else None
if tp is Generic:
return Generic
return None
if isinstance(tp, GenericMeta):
return _gorg(tp)
if is_union_type(tp):
return Union
if is_tuple_type(tp):
return Tuple
if is_literal_type(tp):
if NEW_TYPING:
return tp.__origin__ or tp
return Literal
return None
def get_parameters(tp):
"""Return type parameters of a parameterizable type as a tuple
in lexicographic order. Parameterizable types are generic types,
unions, tuple types and callable types. Examples::
get_parameters(int) == ()
get_parameters(Generic) == ()
get_parameters(Union) == ()
get_parameters(List[int]) == ()
get_parameters(Generic[T]) == (T,)
get_parameters(Tuple[List[T], List[S_co]]) == (T, S_co)
get_parameters(Union[S_co, Tuple[T, T]][int, U]) == (U,)
get_parameters(Mapping[T, Tuple[S_co, T]]) == (T, S_co)
"""
if LEGACY_TYPING:
# python <= 3.5.2
if is_union_type(tp):
params = []
for arg in (tp.__union_params__ if tp.__union_params__ is not None else ()):
params += get_parameters(arg)
return tuple(params)
elif is_tuple_type(tp):
params = []
for arg in (tp.__tuple_params__ if tp.__tuple_params__ is not None else ()):
params += get_parameters(arg)
return tuple(params)
elif is_generic_type(tp):
params = []
base_params = tp.__parameters__
if base_params is None:
return ()
for bp_ in base_params:
for bp in (get_args(bp_) if is_tuple_type(bp_) else (bp_,)):
if _has_type_var(bp) and not isinstance(bp, TypeVar):
raise TypeError(
"Cannot inherit from a generic class "
"parameterized with "
"non-type-variable %s" % bp)
if params is None:
params = []
if bp not in params:
params.append(bp)
if params is not None:
return tuple(params)
else:
return ()
else:
return ()
elif NEW_TYPING:
if (
(
isinstance(tp, typingGenericAlias) and
hasattr(tp, '__parameters__')
) or
isinstance(tp, type) and issubclass(tp, Generic) and
tp is not Generic):
return tp.__parameters__
else:
return ()
elif (
is_generic_type(tp) or is_union_type(tp) or
is_callable_type(tp) or is_tuple_type(tp)
):
return tp.__parameters__ if tp.__parameters__ is not None else ()
else:
return ()
def get_last_args(tp):
"""Get last arguments of (multiply) subscripted type.
Parameters for Callable are flattened. Examples::
get_last_args(int) == ()
get_last_args(Union) == ()
get_last_args(ClassVar[int]) == (int,)
get_last_args(Union[T, int]) == (T, int)
get_last_args(Iterable[Tuple[T, S]][int, T]) == (int, T)
get_last_args(Callable[[T], int]) == (T, int)
get_last_args(Callable[[], int]) == (int,)
"""
if NEW_TYPING:
raise ValueError('This function is only supported in Python 3.6,'
' use get_args instead')
elif is_classvar(tp):
return (tp.__type__,) if tp.__type__ is not None else ()
elif is_generic_type(tp):
try:
if tp.__args__ is not None and len(tp.__args__) > 0:
return tp.__args__
except AttributeError:
# python 3.5.1
pass
return tp.__parameters__ if tp.__parameters__ is not None else ()
elif is_union_type(tp):
try:
return tp.__args__ if tp.__args__ is not None else ()
except AttributeError:
# python 3.5.2
return tp.__union_params__ if tp.__union_params__ is not None else ()
elif is_callable_type(tp):
return tp.__args__ if tp.__args__ is not None else ()
elif is_tuple_type(tp):
try:
return tp.__args__ if tp.__args__ is not None else ()
except AttributeError:
# python 3.5.2
return tp.__tuple_params__ if tp.__tuple_params__ is not None else ()
else:
return ()
def _eval_args(args):
"""Internal helper for get_args."""
res = []
for arg in args:
if not isinstance(arg, tuple):
res.append(arg)
elif is_callable_type(arg[0]):
callable_args = _eval_args(arg[1:])
if len(arg) == 2:
res.append(Callable[[], callable_args[0]])
elif arg[1] is Ellipsis:
res.append(Callable[..., callable_args[1]])
else:
res.append(Callable[list(callable_args[:-1]), callable_args[-1]])
else:
res.append(type(arg[0]).__getitem__(arg[0], _eval_args(arg[1:])))
return tuple(res)
def get_args(tp, evaluate=None):
"""Get type arguments with all substitutions performed. For unions,
basic simplifications used by Union constructor are performed.
On versions prior to 3.7 if `evaluate` is False (default),
report result as nested tuple, this matches
the internal representation of types. If `evaluate` is True
(or if Python version is 3.7 or greater), then all
type parameters are applied (this could be time and memory expensive).
Examples::
get_args(int) == ()
get_args(Union[int, Union[T, int], str][int]) == (int, str)
get_args(Union[int, Tuple[T, int]][str]) == (int, (Tuple, str, int))
get_args(Union[int, Tuple[T, int]][str], evaluate=True) == \
(int, Tuple[str, int])
get_args(Dict[int, Tuple[T, T]][Optional[int]], evaluate=True) == \
(int, Tuple[Optional[int], Optional[int]])
get_args(Callable[[], T][int], evaluate=True) == ([], int,)
"""
if NEW_TYPING:
if evaluate is not None and not evaluate:
raise ValueError('evaluate can only be True in Python >= 3.7')
# Note special aliases on Python 3.9 don't have __args__.
if isinstance(tp, typingGenericAlias) and hasattr(tp, '__args__'):
res = tp.__args__
if get_origin(tp) is collections.abc.Callable and res[0] is not Ellipsis:
res = (list(res[:-1]), res[-1])
return res
if MaybeUnionType and isinstance(tp, MaybeUnionType):
return tp.__args__
return ()
if is_classvar(tp) or is_final_type(tp):
return (tp.__type__,) if tp.__type__ is not None else ()
if is_literal_type(tp):
return tp.__values__ or ()
if (
is_generic_type(tp) or is_union_type(tp) or
is_callable_type(tp) or is_tuple_type(tp)
):
try:
tree = tp._subs_tree()
except AttributeError:
# Old python typing module <= 3.5.3
if is_union_type(tp):
# backport of union's subs_tree
tree = _union_subs_tree(tp)
elif is_generic_type(tp):
# backport of GenericMeta's subs_tree
tree = _generic_subs_tree(tp)
elif is_tuple_type(tp):
# ad-hoc (inspired by union)
tree = _tuple_subs_tree(tp)
else:
# tree = _subs_tree(tp)
return ()
if isinstance(tree, tuple) and len(tree) > 1:
if not evaluate:
return tree[1:]
res = _eval_args(tree[1:])
if get_origin(tp) is Callable and res[0] is not Ellipsis:
res = (list(res[:-1]), res[-1])
return res
return ()
def get_bound(tp):
"""Return the type bound to a `TypeVar` if any.
It the type is not a `TypeVar`, a `TypeError` is raised.
Examples::
get_bound(TypeVar('T')) == None
get_bound(TypeVar('T', bound=int)) == int
"""
if is_typevar(tp):
return getattr(tp, '__bound__', None)
else:
raise TypeError("type is not a `TypeVar`: " + str(tp))
def get_constraints(tp):
"""Returns the constraints of a `TypeVar` if any.
It the type is not a `TypeVar`, a `TypeError` is raised
Examples::
get_constraints(TypeVar('T')) == ()
get_constraints(TypeVar('T', int, str)) == (int, str)
"""
if is_typevar(tp):
return getattr(tp, '__constraints__', ())
else:
raise TypeError("type is not a `TypeVar`: " + str(tp))
def get_generic_type(obj):
"""Get the generic type of an object if possible, or runtime class otherwise.
Examples::
class Node(Generic[T]):
...
type(Node[int]()) == Node
get_generic_type(Node[int]()) == Node[int]
get_generic_type(Node[T]()) == Node[T]
get_generic_type(1) == int
"""
gen_type = getattr(obj, '__orig_class__', None)
return gen_type if gen_type is not None else type(obj)
def get_generic_bases(tp):
"""Get generic base types of a type or empty tuple if not possible.
Example::
class MyClass(List[int], Mapping[str, List[int]]):
...
MyClass.__bases__ == (List, Mapping)
get_generic_bases(MyClass) == (List[int], Mapping[str, List[int]])
"""
if LEGACY_TYPING:
return tuple(t for t in tp.__bases__ if isinstance(t, GenericMeta))
else:
return getattr(tp, '__orig_bases__', ())
def typed_dict_keys(td):
"""If td is a TypedDict class, return a dictionary mapping the typed keys to types.
Otherwise, return None. Examples::
class TD(TypedDict):
x: int
y: int
class Other(dict):
x: int
y: int
typed_dict_keys(TD) == {'x': int, 'y': int}
typed_dict_keys(dict) == None
typed_dict_keys(Other) == None
"""
if isinstance(td, (_TypedDictMeta_Mypy, _TypedDictMeta_TE)):
return td.__annotations__.copy()
return None
def get_forward_arg(fr):
"""
If fr is a ForwardRef, return the string representation of the forward reference.
Otherwise return None. Examples::
tp = List["FRef"]
fr = get_args(tp)[0]
get_forward_arg(fr) == "FRef"
get_forward_arg(tp) == None
"""
return fr.__forward_arg__ if is_forward_ref(fr) else None
# A few functions backported and adapted for the LEGACY_TYPING context, and used above
def _replace_arg(arg, tvars, args):
"""backport of _replace_arg"""
if tvars is None:
tvars = []
# if hasattr(arg, '_subs_tree') and isinstance(arg, (GenericMeta, _TypingBase)):
# return arg._subs_tree(tvars, args)
if is_union_type(arg):
return _union_subs_tree(arg, tvars, args)
if is_tuple_type(arg):
return _tuple_subs_tree(arg, tvars, args)
if is_generic_type(arg):
return _generic_subs_tree(arg, tvars, args)
if isinstance(arg, TypeVar):
for i, tvar in enumerate(tvars):
if arg == tvar:
return args[i]
return arg
def _remove_dups_flatten(parameters):
"""backport of _remove_dups_flatten"""
# Flatten out Union[Union[...], ...].
params = []
for p in parameters:
if isinstance(p, _Union): # and p.__origin__ is Union:
params.extend(p.__union_params__) # p.__args__)
elif isinstance(p, tuple) and len(p) > 0 and p[0] is Union:
params.extend(p[1:])
else:
params.append(p)
# Weed out strict duplicates, preserving the first of each occurrence.
all_params = set(params)
if len(all_params) < len(params):
new_params = []
for t in params:
if t in all_params:
new_params.append(t)
all_params.remove(t)
params = new_params
assert not all_params, all_params
# Weed out subclasses.
# E.g. Union[int, Employee, Manager] == Union[int, Employee].
# If object is present it will be sole survivor among proper classes.
# Never discard type variables.
# (In particular, Union[str, AnyStr] != AnyStr.)
all_params = set(params)
for t1 in params:
if not isinstance(t1, type):
continue
if any(isinstance(t2, type) and issubclass(t1, t2)
for t2 in all_params - {t1}
if (not (isinstance(t2, GenericMeta) and
get_origin(t2) is not None) and
not isinstance(t2, TypeVar))):
all_params.remove(t1)
return tuple(t for t in params if t in all_params)
def _subs_tree(cls, tvars=None, args=None):
"""backport of typing._subs_tree, adapted for legacy versions """
def _get_origin(cls):
try:
return cls.__origin__
except AttributeError:
return None
current = _get_origin(cls)
if current is None:
if not is_union_type(cls) and not is_tuple_type(cls):
return cls
# Make of chain of origins (i.e. cls -> cls.__origin__)
orig_chain = []
while _get_origin(current) is not None:
orig_chain.append(current)
current = _get_origin(current)
# Replace type variables in __args__ if asked ...
tree_args = []
def _get_args(cls):
if is_union_type(cls):
cls_args = cls.__union_params__
elif is_tuple_type(cls):
cls_args = cls.__tuple_params__
else:
try:
cls_args = cls.__args__
except AttributeError:
cls_args = ()
return cls_args if cls_args is not None else ()
for arg in _get_args(cls):
tree_args.append(_replace_arg(arg, tvars, args))
# ... then continue replacing down the origin chain.
for ocls in orig_chain:
new_tree_args = []
for arg in _get_args(ocls):
new_tree_args.append(_replace_arg(arg, get_parameters(ocls), tree_args))
tree_args = new_tree_args
return tree_args
def _union_subs_tree(tp, tvars=None, args=None):
""" backport of Union._subs_tree """
if tp is Union:
return Union # Nothing to substitute
tree_args = _subs_tree(tp, tvars, args)
# tree_args = tp.__union_params__ if tp.__union_params__ is not None else ()
tree_args = _remove_dups_flatten(tree_args)
if len(tree_args) == 1:
return tree_args[0] # Union of a single type is that type
return (Union,) + tree_args
def _generic_subs_tree(tp, tvars=None, args=None):
""" backport of GenericMeta._subs_tree """
if tp.__origin__ is None:
return tp
tree_args = _subs_tree(tp, tvars, args)
return (_gorg(tp),) + tuple(tree_args)
def _tuple_subs_tree(tp, tvars=None, args=None):
""" ad-hoc function (inspired by union) for legacy typing """
if tp is Tuple:
return Tuple # Nothing to substitute
tree_args = _subs_tree(tp, tvars, args)
return (Tuple,) + tuple(tree_args)
def _has_type_var(t):
if t is None:
return False
elif is_union_type(t):
return _union_has_type_var(t)
elif is_tuple_type(t):
return _tuple_has_type_var(t)
elif is_generic_type(t):
return _generic_has_type_var(t)
elif is_callable_type(t):
return _callable_has_type_var(t)
else:
return False
def _union_has_type_var(tp):
if tp.__union_params__:
for t in tp.__union_params__:
if _has_type_var(t):
return True
return False
def _tuple_has_type_var(tp):
if tp.__tuple_params__:
for t in tp.__tuple_params__:
if _has_type_var(t):
return True
return False
def _callable_has_type_var(tp):
if tp.__args__:
for t in tp.__args__:
if _has_type_var(t):
return True
return _has_type_var(tp.__result__)
def _generic_has_type_var(tp):
if tp.__parameters__:
for t in tp.__parameters__:
if _has_type_var(t):
return True
return False
