$ brew install pyenv
$ pyenv install 3.7.5
$ pyenv global 3.7.5
$ echo -e 'if command -v pyenv 1>/dev/null 2>&1; then\n eval "$(pyenv init -)"\nfi' >> ~/.zshrc
$ which python
https://mrdjangoblog.wordpress.com/2016/08/18/installing-pyenv-python-3-5/