There's an easy way to do this already: #! /usr/bin/env python2 vs #! /usr/bin/env python3 Python allows you easily to run different versions side by side.

There's an easy way to do this already: #! /usr/bin/env python2 vs #! /usr/bin/env python3 Python allows you easily to run different versions side by side. There's really no good excuses. Red Hat is major reason why the migration is so tough. They still ship with Python 2.6.