导入迭代报如下的错：
代码：from collections import Iterable
Warning (from warnings module):
File "__main__", line 1
DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working。
因为collections在python 3.8已经不起作用了，需要改成collections.abc，故正确应该是： from collections.abc import Iterable
如下图：
