title: How do I print to the OS's default printer in Python 3 (cross platform)?
body: <p>I have a Python 3 script that is going to be doing some regex substitution on some Rich Text Files (<code>rtf</code>) and I would like to be able to print out a whole directory's files on Windows, Linux, and Mac.  </p>
  
  <p>Is there a way to print to the OS's default printer so that it works in all platforms?</p>