pip install throws TypeError when solving conflict

[xuyan-ru]

Description

I have a python environment mainly managed by conda/mamba, and when I was trying to install pytorch with pip, I got some TypeError: expected string or byte-like object, got 'NoneType'. I don't think this is something wrong with my environment, probably a bug in pip

Expected behavior

No response

pip version

24.2

Python version

3.11.9

OS

Linux (RH7)

How to Reproduce

pip3 install torch --index-url https://download.pytorch.org/whl/cu118

Output

Code of Conduct

• I agree to follow the PSF Code of Conduct.

[notatallshaw]

The exception implies that you have a broken package installed, i.e. a version can not be found from the dist info.

Do you get the same error when you run pip3 list? Does it work if you run pip3 install --ignore-installed (if it works this is not a real solution, you should fix your environment)?