可调用对象的联合和可调用对象列表转换为可调用对象列表时出现Python mypy类型错误

from typing import Callable, List, Union

def example() -> None:
    pass

def process_callables(callables: Union[Callable[..., Any], List[Callable[..., Any]]]) -> None:
    callables_list: List[Callable[..., Any]] = callables  # mypy错误
    for callable in callables_list:
        callable()

from typing import Callable, List, Union, cast

def example() -> None:
    pass

def process_callables(callables: Union[Callable[..., Any], List[Callable[..., Any]]]) -> None:
    if isinstance(callables, list):
        callables_list = callables
    else:
        callables_list = [callables]
    for callable in callables_list:
        callable()

# 或者使用类型断言
def process_callables_with_cast(callables: Union[Callable[..., Any], List[Callable[..., Any]]]) -> None:
    callables_list: List[Callable[..., Any]] = cast(List[Callable[..., Any]], callables)
    for callable in callables_list:
        callable()