> making python 2. as default may bring issues. Who's suggesting that you change the system default? If you want to make your python scripts run on a certain p

> making python 2. as default may bring issues. Who's suggesting that you change the system default? If you want to make your python scripts run on a certain python version, set their shebang accordingly. Changing the default interpreter for system scripts because you want your scripts to run on a different version is crazy. If your lamp is too bright, do you swap the transformer supplying the whole street's mains electricity supply for one with a different voltage and hope your neighbour's computer doesn't break, or do you turn your lamp down?