Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since

Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3,and in 3.9 it will stop working

确保Django 的settings.py中的DEBUG=TRUE,

报错的浏览器页面就会有尽可能多的信息，

解决方案:

subl /home/appleyuchi/.virtualenvs/python3.7/lib/python3.7/site-packages/html5lib/_trie/_base.py

from collections import Mapping

改为:

from collections.abc import Mapping

注意：

不一定是上面的这个文件，也可能是其他文件，具体哪个文件根据浏览器页面的报错信息来解决