模块导入from collections import Iterator,Iterable失败

1.引入模块报错

　　from collections import Iterator,Iterable

报错：
　　DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working from collections import Iterator,Iterable

2.修改为：

　　from collections.abc import Iterator,Iterable