Getting DeprecationWarning from collections library

[ocampor]

Problem

I am getting depreciation warnings from the collections package.

DeprecationWarning: 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

Solution

Change all the collections imports to collections.abc.

Can I create a PR with changes?

Yes