title: How can I install a previous version of Python 3 in macOS using homebrew?
body: <p>How can I install a previous version of Python 3 in macOS using brew?</p>
  
  <p>With the command <code>brew install python</code> I got the latest version of Python 3 (currently v3.7.0), but I want the last version of Python 3.6 (currently 3.6.5).</p>
  
  <p>I have read about another package <code>pyenv</code> that can assist in handle different python installation, but this solution is not suitable for me.</p>