`Iterable[(int, int)]` 元组在类型提示中是不允许的

`Iterable[(int, int)]` tuple is not allowed in type hints

我有这个非常简单的代码:

from typing import List, Iterable

Position = (int, int)
IntegerMatrix = List[List[int]]

def locate_zeros(matrix: IntegerMatrix) -> Iterable[Position]:
    """Given an NxM matrix find the positions that contain a zero."""
    for row_num, row in enumerate(matrix):
        for col_num, element in enumerate(row):
            if element == 0:
                yield (col_num, row_num)

这是错误:

Traceback (most recent call last):
  File "type_m.py", line 6, in <module>
    def locate_zeros(matrix: IntegerMatrix) -> Iterable[Position]:
  File "/usr/lib/python3.5/typing.py", line 970, in __getitem__
    (len(self.__parameters__), len(params)))
TypeError: Cannot change parameter count from 1 to 2

为什么我不能将 Int 对的可迭代作为 return 类型?

-> PositionIterable[Any] 都有效,只是 IterablePosition 一起无效。

您应该使用 typing.Tuple[int, int] 来声明元组类型 Position,而不是 (int, int)