You have successfully installed pyenv! 3. Then quit your shell session and start a new one for the changes to take effect. # ~/.zprofile # eval '$(pyenv init -path)' # ~/.zshrc # if command -v pyenv 1>/dev/null 2>&1 then eval '$(pyenv init -)' fi

Add the following lines to ~/.zprofile and ~/.zshrc (or ~/.bash_profile and ~/.bashrc if you’re still using bash):.

To install, follow these instructions (or see the full installation instructions on the official GitHub repository): It allows you to install multiple versions of Python and easily switch between them. Pyenv is a Python version management tool. To install it, follow the simple instructions here. It allows you to install all sorts of useful tools. See the documentation for full details, but here are the simple instructions to install any version of Python: 1. It’s really easy to install and manage multiple versions of Python using pyenv. Linux users might benefit from the pyenv tutorial, but Windows users are out of luck - pyenv does not officially support Windows. Note: this article is geared towards Mac users, and especially Apple Silicon Mac users. With pyenv you can install multiple Python versions on your machine and easily switch between them.

That’s where version management comes in, and my preferred tool is pyenv.

As a data scientist I encounter this all the time - I frequently need to rerun old analyses or projects, so I need a way to support multiple Python versions on my machine. On the other hand, you don’t want to break all of your old code when you upgrade your installed Python version. One one hand, Python is an active language and you’ll want to take advantage of the newest features ( Python 3.10 was recently released!). You probably won’t use the same version of Python for all of your projects for the rest of eternity.

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