python - Python 中元组的返回类型注释

Question

我有功能:

def func() -> tuple(str, list(str)):
    var_a = "four"
    var_b = ["one","two","three"]
    return var_a, var_b

当我调用它时，它给出以下错误:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'type' object is not iterable

我也试过这样:

from typing import Tuple
def func() -> Tuple[str, list(str)]:
    var_a = "four"
    var_b = ["one","two","three"]
    return var_a, var_b

而且，我遇到了完全相同的错误。

如何为这种情况提供正确的返回类型注释？

Answer 1

通过使用List[str] ，list 的通用版本:

from typing import List, Tuple

def func() -> Tuple[str, List[str]]:
    var_a = "four"
    var_b = ["one","two","three"]
    return var_a, var_b