pyenv

TLDR

List all available commands

$ pyenv commands

List all Python versions under the ${PYENV_ROOT}/versions directory

$ pyenv versions

List all Python versions that can be installed from upstream

$ pyenv install --list

Install a Python version under the ${PYENV_ROOT}/versions directory

$ pyenv install [2.7.10]

Uninstall a Python version under the ${PYENV_ROOT}/versions directory

$ pyenv uninstall [2.7.10]

Set Python version to be used globally in the current machine

$ pyenv global [2.7.10]

Set Python version to be used in the current directory and all directories below it

$ pyenv local [2.7.10]