title: check system if font exists python (OS agnostic)
body: <p>I have seen a few answers regarding how to retrieve the font list via different modules, such at matlab, or Tkinter, but I don't want to include a huge library like those to solve my current problem of just retrieving this list. </p>
  
  <p><strong>Background:</strong> I am working on an html to pdf system, and it runs on both OSX and ubuntu servers, so the answer can't be just a single os implementation</p>
  
  <p><strong>TL;DR:</strong> are there any light modules/libraries in python that will allow me to retrieve the list of existing fonts on the hosting server?</p>