Python如何引用内置类function

Question

我在编辑代码时需要使用Python的类function，但是将跟类function的代码加入后却出现如下错误：

Traceback (most recent call last):
  File "x x x.py", line 58, in <module>
      ............................
       ^^^^^^^^
NameError: name 'function' is not defined

使用VSCode也可以在builtins.pyi找到该类：

class function:
    # Make sure this class definition stays roughly in line with `types.FunctionType`
    @property
    def __closure__(self) -> tuple[_Cell, ...] | None: ...
    __code__: CodeType
    __defaults__: tuple[Any, ...] | None
    __dict__: dict[str, Any]
    @property
    def __globals__(self) -> dict[str, Any]: ...
    __name__: str
    __qualname__: str
    __annotations__: dict[str, Any]
    __kwdefaults__: dict[str, Any]
    if sys.version_info >= (3, 10):
        @property
        def __builtins__(self) -> dict[str, Any]: ...

    __module__: str
    # mypy uses `builtins.function.__get__` to represent methods, properties, and getset_descriptors so we type the return as Any.
    def __get__(self, obj: object | None, type: type | None = ...) -> Any: ...

即使加入“from builtins import function”，却仍然抛出相同错误。
请问如何才能引用这个叫“function”的类？

Answer 1

说直接一点，function这个类虽然在builtins里有定义，但是是内建类型，不能访问。你看看vscode里这个注释：

里面写了，Doesn't exist at runtime，运行时不存在。