Install Python versions

$ pyenv install [version_number]

View all the installed versions

$ pyenv versions

Switch versions globally

# List the current global python version
$ pyenv global# Switch to the specified version
$ pyenv global [version_number or virtual_env_name]

Create a virtual environment based on a specified python version

$ pyenv virtualenv [specified_version] [virtual_env_name]

Switch versions locally

# Go to the specified project directory 
$ cd [project_directory]# Set a local python version
$ pyenv local [version_number or virtual_env_name]

References

• https://anil.io/blog/python/pyenv/using-pyenv-to-install-multiple-python-versions-tox/