I got both python2 and python3 installed in my debian machine. But when i try to invoke the python interpreter by just typing \'python\' in bash, python2 pops up and not python3
the only somehow safe way would be to use an alias in your shell, by placing
alias python=python3
into your ~/.profile or ~/.bashrc...
~/.profile
~/.bashrc
this way the system scripts depending on python being python2 won't be affected.