Echo $ Pythonpath Ubuntu Setzen Sie Standardeinstellung

If a Python user has Python2.7, Python3.5 and Python3.6 installed in
Ubuntu, echo $PYTHONPATH return 
:/usr/local/lib/python3.5/dist-packages:/usr/local/lib/python2.7/dist-packages:/usr/local/lib/python3.6/dist-packages
Merwanski