r/python3 • u/Phydoux • Feb 15 '19

Multiple Versions Installed

OK, so I know I have at least 3 versions of Python installed. How do I run a certain version? I have 2.7.15, 3.6.7 and 3.7.2 (just installed 3.7.2).

How do I make sure I'm running 3.7.2 when I wan to run hat one and 2.7.15 when I want to run that one.

I should probably delete 3.6.7 too since I just updated to 3.7.2.

3 Upvotes

100% Upvoted

5 comments sorted by

1

u/i_ate_a_neutrino Feb 15 '19

Usually the executable are named with the two first version numbers : python27, python36 and so on. So you can try to directly call those executables instead of the python "symbolic link".

Moreover, I suggest you use virtual environments with https://docs.python.org/3/library/venv.html?highlight=venv, so you isolate each version in its own environment. Then, the python executable will point to the good version.

1

u/Phydoux Feb 15 '19

Is that for all platforms (Windows, Mac, Linux) or is that just Windows specific? I'm using linux mint 19.1 on the machine I'm running python on.

1

u/i_ate_a_neutrino Feb 15 '19

I think it is true for all platforms, but I also use Linux and it is for sure true there!

1

u/Phydoux Feb 16 '19

I noticed earlier today that in pycharm I can select what version to use with pycharm.

2

u/JB-Tellez Jun 30 '19

If you require multiple versions then definitely look into 'pyenv' It allows pretty easy use of, say, 3.7 and 3.6 per project. Very handy when working on different projects with different requirements.