从函数注释中获取联合值？

Question

我正在寻找函数的注释，特别是每个注释的 Union 值。让我举个例子：

from typing import Union

async def func(arg1: str, arg2: int, arg3: Union[str, int]):
    ...

# Want to get
# {arg3: [str, int], arg1: str, ...}

我知道 func.__annotations__ returns 字典，但我不确定 Union 类型提示

Answer 1

使用typing.get_args:

>>> func.__annotations__['arg3']
typing.Union[str, int]
>>> from typing import get_args
>>> get_args(func.__annotations__['arg3'])
(<class 'str'>, <class 'int'>)

从函数注释中获取联合值？

Get Union values from function annotations?

python

annotations

python-typing