python - Pip is not working: ImportError: No module named 'pip ...
If nothing turns up, reboot your machine, then reinstall python 2/3 using apt-get install <package name>. Finally, if you run in to something unexpected, run find / -iname python* (you'll probably need sudo permissions for these commands). If anything turns up which is a directory with a binary, remove the enclosing directory, then reboot.