Error: failed to commit transaction (conflicting files) - python-pip ; /usr/lib/python3.8

Let me guess … you used sudo with pip ?
Dont do that.

For your error:

Update or package installation returns “Failed to commit transaction (conflicting files); FILENAME exists in filesystem”

For not repeating it:

Python - ArchWiki

Looks like we need to recreate this old FAQ/Tut