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

under project name go to following file in virtual enviroment. venv\Lib\site-packages\pip_internal\distributions__init__.py comment out the very first line which reads.

from pip._internal.distributions.source import SourceDistribution

then install pip version desired.