I've come across the following bu in using pip
recently:
$ pip --version
Traceback (most recent call last):
File "/usr/local/bin/pip", line 7, in <module>
from pip._internal.cli.main import main
ModuleNotFoundError: No module named 'pip._internal'
$ uname -a
Linux 13.1.el7.x86_64 #1 SMP Tue Jun 23 15:46:38 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Any idea how to fix this, or do I need to completely reinstall pip?