如何在mypy中使用reveal_type [英] How to use reveal_type in mypy

问题描述

我读到我可以通过使用一个名为 reveal_type 的函数来显示变量的类型，但我找不到如何使用它或从哪里导入它.

I have read that I can reveal the type of variables by using a function called reveal_type, but I can't find how to use it or from where to import it.

推荐答案

我终于知道怎么用了:你应该把代码中的 reveal_type 放进去使用，然后运行使用 mypy 程序.然后，它会记录一条如下所示的消息:

I found out in the end how to use it: You should just put and use the reveal_type in the code, and run it with the mypy program. Then, it will log a message that look like this:

Revealed type is 'builtins.str*'

来自 mypy 文档:

reveal_type 只能被 mypy 理解，在 Python 中不存在，如果你试图运行你的程序.在运行代码之前，您必须删除任何reveal_type 调用.reveal_type 始终可用，您无需导入.

reveal_type is only understood by mypy and doesn’t exist in Python, if you try to run your program. You’ll have to remove any reveal_type calls before you can run your code. reveal_type is always available and you don’t need to import it.

更多阅读:这里.

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