如何在 Python 中为类型定义别名以进行类型提示 [英] How to define an alias for a type in Python for type hinting

问题描述

如何为类型定义别名以使用类型提示:

How to define an alias for a type to use type hint:

import typing
type Ticker str # How to do this? I used golang notation. How do you do it in python?
Report = typing.Dict[Ticker, typing.List] 

这意味着 Ticker 是一种字符串类型，而 Report 是从 Ticker 到列表的字典.谢谢你.这种别名的好处是任何人都知道它是一个自动收报机.比写 Report = typing.Dict[str, Typing.List]

Which means Ticker is a type of string and Report is a dict from Ticker to a list. Thank you. The good thing about this aliasing is that anyone knows that it is a ticker. Much clear and more readable than writing Report = typing.Dict[str, typing.List]

推荐答案

与绑定到对象的所有其他名称一样:

As you do with all other names that you bind to objects:

Ticker = typing.Text

参见 https://docs.python.org/3/library/typing.html#type-aliases

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