title: moving python3 to brew and updating
body: <p>I am running osx 10.11.6 (el-capitan) a long time ago I installed Python3 using the download on python.org (3.5.0) since then I've installed brew and would like to use brew to manage python3 instead. I have to upgrade to python3.6 because I'm getting the tlsv1 alert protocol version error. </p>
  
  <ol>
  <li><p>How do I uninstall my current python3 </p></li>
  <li><p>How do I get brew to install python 3.6 (it seems to only want to install 3.5.1)</p></li>
  </ol>
  
  <p>or is it better to just run different python versions beside one another?</p>
  
  <p>Thanks!</p>