你不能在 2.7 中直接使用新的 (3.5+) 注释语法，但是如果你有 python 3.4+ 你可以安装 mypy 并在你的机器上运行它2.7 不同语法的代码.请参阅 PEP 484.

You can't use the new (3.5+) annotation syntax directly in 2.7, but if you have python 3.4+ you can install mypy and run it on your 2.7 code with a different syntax. See PEP 484.

您在链接中指向的示例可以在 2.7 中编写为:

The example you pointed to in your link could be written in 2.7 as:

class Completion:
    def __init__(self, start, end, text, type=None, _origin=''):
        # type: (int, int, str, str, str) -> None
        ...