Can't install anything with pip3

[wennaspeedy]

Finally I found solution from here: https://stackoverflow.com/questions/49060525/install-jupyterlab-in-pip3-throws-typeerror-expected-string-or-bytes-like-obje

and

here: https://stackoverflow.com/questions/67074684/pip-has-problems-with-metadata

Briefly:

1. Open file "/usr/lib/python3.9/site-packages/packaging/version.py"

2. replace self._regex.search(version) to self._regex.search(str(version))

3. use flag with pip --use-deprecated=legacy-resolver