pip no longer working after update error 'module' object is not callable
All credit for this goes to user han_solo, who left the answer as a comment, instead of as an answer:
Instead of pip install stdlib_list --user
use python -m pip install stdlib_list --user
Replace stdlib_list with matplotlib or whatever the name is of the package you want.
I've had the same issue as you, and I solved it uninstalling pip and installing again.
To uninstall:python -m pip uninstall pip
To install, follow the instructions:https://www.liquidweb.com/kb/install-pip-windows/
After that you will going to have a older but functional 19.0.3 version.
If you do not wish to use the long command every time python -m pip install <package>, reinstall pip to the older version where this error wasn't there.
python -m pip install pip==19.0.3Now you will be able to use pip install matplotlib or pip list normally.
And whenever the bug is resolved, upgrade pip like you did before.