$ git clone https://github.com/pyenv/pyenv.git ~/.pyenv $ echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile $ echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bash_profile $ echo -e 'if command -v pyenv 1>/dev/null 2>&1; then eval "$(pyenv init -)" fi' >> ~/.bash_profile $ source ~/.bash_profile $ pyenv install 3.9.5 $ pyenv install 2.7.18 $ pyenv virtualenv 3.9.5 myproject $ pyenv activate myproject $ python --version