Can't install pygame on macos

So I'm using vscode and I installed python, I changed my python interpreter to Python 3.1 which I assumed would change the Python version to 3.1 as well? But when I type python --version it still says 2.7.18... And I also installed pygame using "python3 -m pip install -U pygame --user" in my terminal but still when I try to run this any file that imports pygame it says ImportError: No module named pygame Other people have said they have the same problem and maybe I'm missing something but their solutions didn't work for me?