元组的 Python 类型

Question

我只是想在 python 3.85 中为元组定义类型。但是，documentation 中的两种方法似乎都无法正常工作：

Tuple(float,str)

结果：

Traceback (most recent call last):

  File "<ipython-input-30-7964c1934b1f>", line 1, in <module>
    Tuple(float,str)

  File "C:\Users\kinsm\anaconda3\lib\typing.py", line 727, in __call__
    raise TypeError(f"Type {self._name} cannot be instantiated; "

TypeError: Type Tuple cannot be instantiated; use tuple() instead

对比：

tuple(float,str)

结果：

Traceback (most recent call last):
  File "<ipython-input-29-fea16b9491a0>", line 1, in <module>
    tuple(float,str)
result:
TypeError: tuple expected at most 1 argument, got 2

Answer 1

正确的语法是

from typing import Tuple

### ---- Examples ----- ###
Tuple[float, float]
Tuple[float, str]

Answer 2

from typing import Tuple

out = Tuple[float,str]
print(out)

x: Tuple[int, str, float] = (3, "yes", 7.5)
print(x)

输出：

typing.Tuple[float, str]
(3, 'yes', 7.5)