ImportError: cannot import name 'SourceDistribution' from 'pip._internal.distributions.source'

Question

pip3 install is not working and also pip3 is not being able to downgrade to pip19 from pip20.0:

Rayaans-MacBook-Pro:~ rayaangrewal$ pip3 install         


        

Answer 1

This is a bug in pip 20.0; see https://github.com/pypa/pip/issues/7620

It's fixed in pip 20.0.1. Upgrade to 20.0.1+ or downgrade to 19.3.1. Get get-pip.py and run

python get-pip.py

or

python get-pip.py pip==19.3.1