easily switch between multiple versions of python doesn' depend on python itself inserts directory of shims at the front of your path easy installationgit clone https :/github com yyuu pyenv git ~pyenv echo export pyenv_root home pyenv >~bashrc echo export path pyenv_root bin path >~bashrc echo eval pyenv init ->~bashrc =pyenv repository kind of infrastructure to redirect system/function calls metaphora shim is piece of wood or metal to make two things fit together member of the helmholtz association slide