PyEnv

PyEnv is a tool that let's us switch between multiple versions of Python easily.

Note: PyEnv does not support Windows.

To install PyEnv, run:

curl -L https://raw.githubusercontent.com/yyuu/pyenv-installer/master/bin/pyenv-installer | bash

Taken from here https://github.com/pyenv/pyenv

Now let's install 3.7

pyenv install 3.7.0

We can use PyEnv locally or globally.

Globally means we change our entire Python version on our computer. Locally means that for a specific project or directory we use a different Python version.

In our my-new-project directory, run pyenv local 3.7.0.

And just like that we can use different Python versions for different things.

If we wanted to use 3.7.0 globally instead of 3.8:

pyenv global 3.7.0