84669 person learning
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20005 person learning
5487 person learning
7821 person learning
359900 person learning
3350 person learning
180660 person learning
48569 person learning
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40936 person learning
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32909 person learning
代码如下图，请问foo这个函数定义时候的a:int是什么意思？我在看直播的时候，主播说是可以限制形参a的类型，然而现在看来并不是这样。怎么回事呢？谢谢！
https://docs.python.org/3/library/typing.html
Python 3.5.1 new type hint syntax.It can’t be restricted, it can only be prompted.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
https://docs.python.org/3/library/typing.html
Python 3.5.1 new type hint syntax.
It can’t be restricted, it can only be prompted.