Ben Chuanlong Du's Blog

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Tips on pyenv

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

pyenv lets you easily switch between multiple versions of Python. It's simple, unobtrusive, and follows the UNIX tradition of single-purpose tools that do one thing well.

Install pyenv

curl https://pyenv.run | bash

Usage

  1. Install a specific version of Python.

    pyenv install 3.7.8

  2. Use a specific version of Python.

    pyenv local 3.7.8

  3. Uninstall a specific version of Python 

    pyenv uninstall 3.7.8

Tips & Traps

  1. Precedence of versions of Python are defined in $HOME/.pyenv/version. Place the version of Python that you want to use in the first line of the file.

  2. The root directory of pyenv is controled by the environment variable $PYENV_ROOT. You can report the root directory of pyenv by running the command pyenv root.

References

https://github.com/pyenv/pyenv

https://github.com/pyenv/pyenv-installer

https://www.freecodecamp.org/news/manage-multiple-python-versions-and-virtual-environments-venv-pyenv-pyvenv-a29fb00c296f/

https://medium.com/faun/pyenv-multi-version-python-development-on-mac-578736fb91aa#:~:text=pyenv%20makes%20it%20easy%20to,a%20tool%20like%20tox%20handy.

https://realpython.com/intro-to-pyenv/

https://github.com/pyenv/pyenv#locating-the-python-installation

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