Not the parent but on Ubuntu I use: $ python -m pip ... # Use Python 2 $ python2 -m pip ... # If you want to be sure is using Python 2 $ pyt

Not the parent but on Ubuntu I use: $ python -m pip ... # Use Python 2 $ python2 -m pip ... # If you want to be sure is using Python 2 $ python3 -m pip ... # Use Python 3 $ python3 -m venv ... # Create a virtualenv with Python 3 as documented on https://docs.python.org/3/library/venv.html https://docs.python.org/3/library/venv.html to "prevent any potential confusion as to which Python interpreter a virtual environment will be based on" I know it's verbose and long to type but looks explicit to me and saved me to use the wrong version of Python several times.