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Diffstat (limited to '.venv/lib/python3.12/site-packages/anthropic/_utils/_transform.py')
| -rw-r--r-- | .venv/lib/python3.12/site-packages/anthropic/_utils/_transform.py | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/anthropic/_utils/_transform.py b/.venv/lib/python3.12/site-packages/anthropic/_utils/_transform.py new file mode 100644 index 00000000..18afd9d8 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/anthropic/_utils/_transform.py @@ -0,0 +1,402 @@ +from __future__ import annotations + +import io +import base64 +import pathlib +from typing import Any, Mapping, TypeVar, cast +from datetime import date, datetime +from typing_extensions import Literal, get_args, override, get_type_hints + +import anyio +import pydantic + +from ._utils import ( + is_list, + is_mapping, + is_iterable, +) +from .._files import is_base64_file_input +from ._typing import ( + is_list_type, + is_union_type, + extract_type_arg, + is_iterable_type, + is_required_type, + is_annotated_type, + strip_annotated_type, +) +from .._compat import get_origin, model_dump, is_typeddict + +_T = TypeVar("_T") + + +# TODO: support for drilling globals() and locals() +# TODO: ensure works correctly with forward references in all cases + + +PropertyFormat = Literal["iso8601", "base64", "custom"] + + +class PropertyInfo: + """Metadata class to be used in Annotated types to provide information about a given type. + + For example: + + class MyParams(TypedDict): + account_holder_name: Annotated[str, PropertyInfo(alias='accountHolderName')] + + This means that {'account_holder_name': 'Robert'} will be transformed to {'accountHolderName': 'Robert'} before being sent to the API. + """ + + alias: str | None + format: PropertyFormat | None + format_template: str | None + discriminator: str | None + + def __init__( + self, + *, + alias: str | None = None, + format: PropertyFormat | None = None, + format_template: str | None = None, + discriminator: str | None = None, + ) -> None: + self.alias = alias + self.format = format + self.format_template = format_template + self.discriminator = discriminator + + @override + def __repr__(self) -> str: + return f"{self.__class__.__name__}(alias='{self.alias}', format={self.format}, format_template='{self.format_template}', discriminator='{self.discriminator}')" + + +def maybe_transform( + data: object, + expected_type: object, +) -> Any | None: + """Wrapper over `transform()` that allows `None` to be passed. + + See `transform()` for more details. + """ + if data is None: + return None + return transform(data, expected_type) + + +# Wrapper over _transform_recursive providing fake types +def transform( + data: _T, + expected_type: object, +) -> _T: + """Transform dictionaries based off of type information from the given type, for example: + + ```py + class Params(TypedDict, total=False): + card_id: Required[Annotated[str, PropertyInfo(alias="cardID")]] + + + transformed = transform({"card_id": "<my card ID>"}, Params) + # {'cardID': '<my card ID>'} + ``` + + Any keys / data that does not have type information given will be included as is. + + It should be noted that the transformations that this function does are not represented in the type system. + """ + transformed = _transform_recursive(data, annotation=cast(type, expected_type)) + return cast(_T, transformed) + + +def _get_annotated_type(type_: type) -> type | None: + """If the given type is an `Annotated` type then it is returned, if not `None` is returned. + + This also unwraps the type when applicable, e.g. `Required[Annotated[T, ...]]` + """ + if is_required_type(type_): + # Unwrap `Required[Annotated[T, ...]]` to `Annotated[T, ...]` + type_ = get_args(type_)[0] + + if is_annotated_type(type_): + return type_ + + return None + + +def _maybe_transform_key(key: str, type_: type) -> str: + """Transform the given `data` based on the annotations provided in `type_`. + + Note: this function only looks at `Annotated` types that contain `PropertInfo` metadata. + """ + annotated_type = _get_annotated_type(type_) + if annotated_type is None: + # no `Annotated` definition for this type, no transformation needed + return key + + # ignore the first argument as it is the actual type + annotations = get_args(annotated_type)[1:] + for annotation in annotations: + if isinstance(annotation, PropertyInfo) and annotation.alias is not None: + return annotation.alias + + return key + + +def _transform_recursive( + data: object, + *, + annotation: type, + inner_type: type | None = None, +) -> object: + """Transform the given data against the expected type. + + Args: + annotation: The direct type annotation given to the particular piece of data. + This may or may not be wrapped in metadata types, e.g. `Required[T]`, `Annotated[T, ...]` etc + + inner_type: If applicable, this is the "inside" type. This is useful in certain cases where the outside type + is a container type such as `List[T]`. In that case `inner_type` should be set to `T` so that each entry in + the list can be transformed using the metadata from the container type. + + Defaults to the same value as the `annotation` argument. + """ + if inner_type is None: + inner_type = annotation + + stripped_type = strip_annotated_type(inner_type) + origin = get_origin(stripped_type) or stripped_type + if is_typeddict(stripped_type) and is_mapping(data): + return _transform_typeddict(data, stripped_type) + + if origin == dict and is_mapping(data): + items_type = get_args(stripped_type)[1] + return {key: _transform_recursive(value, annotation=items_type) for key, value in data.items()} + + if ( + # List[T] + (is_list_type(stripped_type) and is_list(data)) + # Iterable[T] + or (is_iterable_type(stripped_type) and is_iterable(data) and not isinstance(data, str)) + ): + # dicts are technically iterable, but it is an iterable on the keys of the dict and is not usually + # intended as an iterable, so we don't transform it. + if isinstance(data, dict): + return cast(object, data) + + inner_type = extract_type_arg(stripped_type, 0) + return [_transform_recursive(d, annotation=annotation, inner_type=inner_type) for d in data] + + if is_union_type(stripped_type): + # For union types we run the transformation against all subtypes to ensure that everything is transformed. + # + # TODO: there may be edge cases where the same normalized field name will transform to two different names + # in different subtypes. + for subtype in get_args(stripped_type): + data = _transform_recursive(data, annotation=annotation, inner_type=subtype) + return data + + if isinstance(data, pydantic.BaseModel): + return model_dump(data, exclude_unset=True, mode="json") + + annotated_type = _get_annotated_type(annotation) + if annotated_type is None: + return data + + # ignore the first argument as it is the actual type + annotations = get_args(annotated_type)[1:] + for annotation in annotations: + if isinstance(annotation, PropertyInfo) and annotation.format is not None: + return _format_data(data, annotation.format, annotation.format_template) + + return data + + +def _format_data(data: object, format_: PropertyFormat, format_template: str | None) -> object: + if isinstance(data, (date, datetime)): + if format_ == "iso8601": + return data.isoformat() + + if format_ == "custom" and format_template is not None: + return data.strftime(format_template) + + if format_ == "base64" and is_base64_file_input(data): + binary: str | bytes | None = None + + if isinstance(data, pathlib.Path): + binary = data.read_bytes() + elif isinstance(data, io.IOBase): + binary = data.read() + + if isinstance(binary, str): # type: ignore[unreachable] + binary = binary.encode() + + if not isinstance(binary, bytes): + raise RuntimeError(f"Could not read bytes from {data}; Received {type(binary)}") + + return base64.b64encode(binary).decode("ascii") + + return data + + +def _transform_typeddict( + data: Mapping[str, object], + expected_type: type, +) -> Mapping[str, object]: + result: dict[str, object] = {} + annotations = get_type_hints(expected_type, include_extras=True) + for key, value in data.items(): + type_ = annotations.get(key) + if type_ is None: + # we do not have a type annotation for this field, leave it as is + result[key] = value + else: + result[_maybe_transform_key(key, type_)] = _transform_recursive(value, annotation=type_) + return result + + +async def async_maybe_transform( + data: object, + expected_type: object, +) -> Any | None: + """Wrapper over `async_transform()` that allows `None` to be passed. + + See `async_transform()` for more details. + """ + if data is None: + return None + return await async_transform(data, expected_type) + + +async def async_transform( + data: _T, + expected_type: object, +) -> _T: + """Transform dictionaries based off of type information from the given type, for example: + + ```py + class Params(TypedDict, total=False): + card_id: Required[Annotated[str, PropertyInfo(alias="cardID")]] + + + transformed = transform({"card_id": "<my card ID>"}, Params) + # {'cardID': '<my card ID>'} + ``` + + Any keys / data that does not have type information given will be included as is. + + It should be noted that the transformations that this function does are not represented in the type system. + """ + transformed = await _async_transform_recursive(data, annotation=cast(type, expected_type)) + return cast(_T, transformed) + + +async def _async_transform_recursive( + data: object, + *, + annotation: type, + inner_type: type | None = None, +) -> object: + """Transform the given data against the expected type. + + Args: + annotation: The direct type annotation given to the particular piece of data. + This may or may not be wrapped in metadata types, e.g. `Required[T]`, `Annotated[T, ...]` etc + + inner_type: If applicable, this is the "inside" type. This is useful in certain cases where the outside type + is a container type such as `List[T]`. In that case `inner_type` should be set to `T` so that each entry in + the list can be transformed using the metadata from the container type. + + Defaults to the same value as the `annotation` argument. + """ + if inner_type is None: + inner_type = annotation + + stripped_type = strip_annotated_type(inner_type) + origin = get_origin(stripped_type) or stripped_type + if is_typeddict(stripped_type) and is_mapping(data): + return await _async_transform_typeddict(data, stripped_type) + + if origin == dict and is_mapping(data): + items_type = get_args(stripped_type)[1] + return {key: _transform_recursive(value, annotation=items_type) for key, value in data.items()} + + if ( + # List[T] + (is_list_type(stripped_type) and is_list(data)) + # Iterable[T] + or (is_iterable_type(stripped_type) and is_iterable(data) and not isinstance(data, str)) + ): + # dicts are technically iterable, but it is an iterable on the keys of the dict and is not usually + # intended as an iterable, so we don't transform it. + if isinstance(data, dict): + return cast(object, data) + + inner_type = extract_type_arg(stripped_type, 0) + return [await _async_transform_recursive(d, annotation=annotation, inner_type=inner_type) for d in data] + + if is_union_type(stripped_type): + # For union types we run the transformation against all subtypes to ensure that everything is transformed. + # + # TODO: there may be edge cases where the same normalized field name will transform to two different names + # in different subtypes. + for subtype in get_args(stripped_type): + data = await _async_transform_recursive(data, annotation=annotation, inner_type=subtype) + return data + + if isinstance(data, pydantic.BaseModel): + return model_dump(data, exclude_unset=True, mode="json") + + annotated_type = _get_annotated_type(annotation) + if annotated_type is None: + return data + + # ignore the first argument as it is the actual type + annotations = get_args(annotated_type)[1:] + for annotation in annotations: + if isinstance(annotation, PropertyInfo) and annotation.format is not None: + return await _async_format_data(data, annotation.format, annotation.format_template) + + return data + + +async def _async_format_data(data: object, format_: PropertyFormat, format_template: str | None) -> object: + if isinstance(data, (date, datetime)): + if format_ == "iso8601": + return data.isoformat() + + if format_ == "custom" and format_template is not None: + return data.strftime(format_template) + + if format_ == "base64" and is_base64_file_input(data): + binary: str | bytes | None = None + + if isinstance(data, pathlib.Path): + binary = await anyio.Path(data).read_bytes() + elif isinstance(data, io.IOBase): + binary = data.read() + + if isinstance(binary, str): # type: ignore[unreachable] + binary = binary.encode() + + if not isinstance(binary, bytes): + raise RuntimeError(f"Could not read bytes from {data}; Received {type(binary)}") + + return base64.b64encode(binary).decode("ascii") + + return data + + +async def _async_transform_typeddict( + data: Mapping[str, object], + expected_type: type, +) -> Mapping[str, object]: + result: dict[str, object] = {} + annotations = get_type_hints(expected_type, include_extras=True) + for key, value in data.items(): + type_ = annotations.get(key) + if type_ is None: + # we do not have a type annotation for this field, leave it as is + result[key] = value + else: + result[_maybe_transform_key(key, type_)] = await _async_transform_recursive(value, annotation=type_) + return result |