Procedure
Install Python with pyenv on macOS or Linux
Install pyenv, initialize it in your shell, install a recent Python 3 release and set it global, then verify with python --version.
Step 1
Install pyenv per https://github.com/pyenv/pyenv . Linux/Unix: curl -fsSL https://pyenv.run | bash . macOS (recommended): brew update && brew install pyenv
Step 2
Set up your shell: run pyenv init --install (or ~/.pyenv/bin/pyenv init --install if using the installer), restart the shell, install build deps if prompted by the docs, then: pyenv install 3.12 && pyenv global 3.12
Step 3
python --version && pyenv version
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