具有两个用例的类型提示函数

from typing import Union, List

def process_data(data: Union[List[int], List[str]]) -> Union[List[int], List[str]]:
    if isinstance(data[0], int):
        return [x * 2 for x in data]
    else:
        return [s.upper() for s in data]

def process_data(data: Union[List[int], List[str]]) -> Union[List[int], List[str]]:
    if not isinstance(data, list):
        raise TypeError("data must be a list")
    if isinstance(data[0], int):
        return [x * 2 for x in data]
    else:
        return [s.upper() for s in data]

from typing import List, Union, TypeVar

T = TypeVar('T', int, str)

def process_data(data: List[T]) -> List[T]:
    if isinstance(data[0], int):
        return [x * 2 for x in data]
    else:
        return [s.upper() for s in data]