If I double click on a .py file it opens "IDLE" (is there another way to open "IDLE"?), but the default python version is 2 when I select "run". I want to PERMANENTLY change the default version to 3 so that I don't have to switch versions every time I switch on my Raspberry Pi.
I have searched for this without success. Most answers predate the inclusion of Python 3 and explain how to install 3 but NOT how to switch the default, hence this question.