Python Development on macOS Notes: pyenv and pyenv-virtualenvwrapper

Here are my notes for using pyenv and pyenv-virtualenvwrapper on macOS.

I use pyenv to install and manage multiple Python versions on the same machine. pyenv makes it possible to upgrade my default version of Python without breaking every project that was created with the older version until I’m ready to upgrade them.

I use pyenv-virtualenvwrapper to manage my projects. pyenv-virtualenvwrapper is a set of tools that make it easier to create, delete, copy, and manage Python virtual environments.

Install pyenv through Homebrew

brew update
brew install pyenv
brew install pyenv-virtualenvwrapper

Configuring pyenv to work with my shell

## set a variable for finding pyenv
export PYENV_ROOT="${HOME}/.pyenv"

# 2024-02 Python  pyenv settings
if command -v pyenv > /dev/null; then
    eval "$(pyenv init --path)";
    eval "$(pyenv init -)";
    pyenv virtualenvwrapper_lazy

Install the “latest” Python versions using pyenv

# install latest Python 3.11
pyenv install 3.11:latest

# to see which version of 3.11 was installed
pyenv latest 3.11
> 3.11.7

# install latest Python 3.12
pyenv install 3.12:latest

# to see which version of 3.12 was installed
pyenv latest 3.12
> 3.12.1

# set each version globally to our latest python 3.x version
pyenv global 3.11.7 3.12.1

Upgrading Python versions

pyenv install --skip-existing 3.11:latest
pyenv install --skip-existing 3.12:latest

List every version of Python that is installable

pyenv install --list

List every installed version of Python

pyenv versions
Jeff Triplett @webology