# 需要导入模块: import typing [as 别名]# 或者: from typing importget_args[as 别名]defget_args(cls)-> Tuple:iftyping_inspect.is_union_type(cls):try:returncls.__union_params__exceptAttributeError:passreturncls.__args__elifissubclass(cls, List):returncls.__args__else:raiseValueError("Canno...
get_args(annotation) failure_msg = f"{value} is not an instance of {annotation}" if origin is typing.Union: is_instance = is_any_instance(value, annotation_args) self.assertTrue(is_instance, failure_msg) else: is_instance = is_annotation_instance(value, annotation) self.assertTrue(is_...
typing.get_origin(tp) typing.get_args(tp) Provide basic introspection for generic types and special typing forms. For a typing object of the form X[Y, Z, ...] these functions return X and (Y, Z, ...). If X is a generic alias for a builtin or collections class, it gets ...
typing.get_origin(tp) typing.get_args(tp) Provide basic introspection for generic types and special typing forms. For a typing object of the form X[Y, Z, ...] these functions return X and (Y, Z, ...). If X is a generic alias for a builtin or collections class, it gets ...
Examples: assert get_origin(Dict[str, int]) is dict assert get_args(Dict[int, str]) == (int, str) assert get_origin(Union[int, str]) is Union assert get_args(Union[int, str]) == (int, str) 3.8 新版功能.@typing.overload The @overload decorator allows describing functions and ...
# 需要导入模块: import typing [as 别名]# 或者: from typing importget_type_hints[as 别名]def_get_type_from_hint(hint):if_is_list_like(hint): [type_] = _ti_get_args(hint)returnList[type_]elif_ti_get_origin(hint)isUnion:# Flatten Union[type, NoneType] (== Optional[type]) to typ...
return func(*args, **kwds) return inner def _eval_type(t, globalns, localns): """Evaluate all forward reverences in the given type t. For use of globalns and localns see the docstring for get_type_hints(). """ if isinstance(t, ForwardRef): return t._evaluate(globalns, localns...
class Resource(Generic[DataType]): @classmethod def fetch(cls) -> list[DataType]: raw = http_get() data_cls = get_args(cls)[0] return [data_cls(**item) for item in raw["response"]]The parameter ends up needing to be passed twice: Resource[ResponseData](ResponseData). (This is ...
是指从Python的typing模块中的Tuple类中获取元组的元素类型。typing模块是Python中用于类型提示的标准库,它提供了一系列用于定义类型的类和函数。 在typing模块中,Tuple类用于表示元组类型。它接受一个或多个类型作为参数,并返回一个表示具有相应类型元素的元组类型。要获取元组的元素类型,可以使用Tuple类的args属性。
get_type_hints、get_origin和get_args模块中的函数将成为您最好的朋友。下面是这样一个装饰器的示例,它解析并强制执行对MaxLen类型的list注释: 代码语言:javascript 复制 from functools import wraps from typing import get_type_hints, get_origin, get_args, Annotated def check_annotations(func): @wraps(...