$ python3.7 -m pip --version pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.7)
also python3.7 -m pip install ... works fine
$ python3.7 -m pip --version python3/ dist-packages (python 3.7)
pip 9.0.1 from /usr/lib/
also python3.7 -m pip install ... works fine