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import sys
from typing import ( # noqa: F401
TYPE_CHECKING,
AbstractSet,
Any,
ClassVar,
Dict,
ForwardRef,
Iterable,
Mapping,
Tuple,
Type,
TypeVar,
Union,
_eval_type, # type: ignore
)
import typing
import types
from typing import Callable as TypingCallable
# Copy from Pydantic: pydantic/v1/typing.py
# This can probably be replaced by the logic in: pydantic/_internal/_typing_extra.py
# after dropping support for Python 3.8 and 3.9
try:
from typing import GenericAlias as TypingGenericAlias # type: ignore
except ImportError:
# python < 3.9 does not have GenericAlias (list[int], tuple[str, ...] and so on)
TypingGenericAlias = ()
if sys.version_info < (3, 10):
def is_union(tp: Union[Type[Any], None]) -> bool:
return tp is Union
WithArgsTypes = (TypingGenericAlias,)
else:
import types
import typing
def is_union(tp: Union[Type[Any], None]) -> bool:
return tp is Union or tp is types.UnionType # noqa: E721
WithArgsTypes = (typing._GenericAlias, types.GenericAlias, types.UnionType)
if sys.version_info < (3, 11):
from typing_extensions import dataclass_transform
else:
from typing import dataclass_transform # noqa: F401
if sys.version_info < (3, 10):
from typing_extensions import TypeAlias
else:
from typing import TypeAlias
if sys.version_info < (3, 9):
from typing import _GenericAlias as GenericAlias # noqa: F401
# Even if get_args and get_origin are available in typing, it's important to
# import them from typing_extensions to have proper origins with Annotated fields
from typing_extensions import Annotated, get_args, get_origin
else:
from typing import GenericAlias # type: ignore # noqa: F401
from typing import Annotated, get_args, get_origin # noqa: F401
if TYPE_CHECKING:
NoArgAnyCallable: TypeAlias = TypingCallable[[], Any]
ReprArgs: TypeAlias = "Iterable[tuple[str | None, Any]]"
AbstractSetIntStr: TypeAlias = "AbstractSet[int] | AbstractSet[str]"
MappingIntStrAny: TypeAlias = "Mapping[int, Any] | Mapping[str, Any]"
DictStrAny: TypeAlias = Dict[str, Any]
IncEx: TypeAlias = "set[int] | set[str] | dict[int, Any] | dict[str, Any] | None"
def lenient_issubclass(
cls: Any, class_or_tuple: Union[Type[Any], Tuple[Type[Any], ...], None]
) -> bool:
# Copy of Pydantic: pydantic/_internal/_utils.py
try:
return isinstance(cls, type) and issubclass(cls, class_or_tuple) # type: ignore[arg-type]
except TypeError: # pragma: no cover
if isinstance(cls, WithArgsTypes):
return False
raise # pragma: no cover
def _check_classvar(v: Union[Type[Any], None]) -> bool:
# Copy of Pydantic: pydantic/v1/typing.py
# This can probably be replaced by the logic in: pydantic/_internal/_typing_extra.py
# after dropping support for Python 3.8 and 3.9
if v is None:
return False
return v.__class__ == ClassVar.__class__ and getattr(v, "_name", None) == "ClassVar"
def is_classvar(ann_type: Type[Any]) -> bool:
# Copy of Pydantic: pydantic/v1/typing.py
# This can probably be replaced by the logic in: pydantic/_internal/_typing_extra.py
# after dropping support for Python 3.8 and 3.9
if _check_classvar(ann_type) or _check_classvar(get_origin(ann_type)):
return True
# this is an ugly workaround for class vars that contain forward references and are therefore themselves
# forward references, see #3679
if ann_type.__class__ == ForwardRef and ann_type.__forward_arg__.startswith(
"ClassVar["
):
return True
return False
def resolve_annotations(
raw_annotations: Dict[str, Type[Any]], module_name: Union[str, None]
) -> Dict[str, Type[Any]]:
# Ref: pydantic/v1/typing.py
# Copy from Pydantic v2's pydantic.v1 for compatibility with versions of Python not
# supported by Pydantic v2, after dropping support for Python 3.8 and 3.9 this can
# be replaced by the logic used in Pydantic v2's ModelMetaclass.__new__
# in: pydantic/_internal/_model_construction.py
base_globals: Union[Dict[str, Any], None] = None
if module_name:
try:
module = sys.modules[module_name]
except KeyError:
# happens occasionally, see https://github.com/pydantic/pydantic/issues/2363
pass
else:
base_globals = module.__dict__
annotations = {}
for name, value in raw_annotations.items():
if isinstance(value, str):
if (3, 10) > sys.version_info >= (3, 9, 8) or sys.version_info >= (
3,
10,
1,
):
value = ForwardRef(value, is_argument=False, is_class=True)
else:
value = ForwardRef(value, is_argument=False)
try:
if sys.version_info >= (3, 13):
value = _eval_type(value, base_globals, None, type_params=())
else:
value = _eval_type(value, base_globals, None)
except NameError:
# this is ok, it can be fixed with update_forward_refs
pass
annotations[name] = value
return annotations
def get_annotations_from_namespace(class_dict: Dict[str, Any]) -> Dict[str, Any]:
# Ref: https://github.com/pydantic/pydantic/pull/11991
raw_annotations: Dict[str, Any] = class_dict.get("__annotations__", {})
if sys.version_info >= (3, 14) and "__annotations__" not in class_dict:
from annotationlib import (
Format,
call_annotate_function,
get_annotate_from_class_namespace,
)
if annotate := get_annotate_from_class_namespace(class_dict):
raw_annotations = call_annotate_function(annotate, format=Format.FORWARDREF)
return raw_annotations
def is_type_argument_subclass(
type_: Type, class_or_tuple: Union[Type[Any], Tuple[Type[Any], ...]]
) -> bool:
args = get_args(type_)
return any(lenient_issubclass(arg, class_or_tuple) for arg in args)
T = TypeVar("T")
def get_first_type_argument_subclassing(
type_: Type, cls: Type[T]
) -> Union[Type[T], None]:
args: Tuple[Type, ...] = get_args(type_)
for arg in args:
if lenient_issubclass(arg, cls):
return arg
return None
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