- switched from using
pip.mainto launching external process viapython -m pipas it is the recommended way of calling pip (see https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program)
pip.main to launching external process via python -m pip as it is the recommended way of calling pip (see https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program)