title: filter out exception messages from unittest output
body: <p>Is it possible to scrap all the exception text that comes as output from using <code>unittest</code>?</p>
  
  <p>I.e., if I have a bunch of tests, and some of them throw exceptions, the <code>unittest</code> module takes it upon itself to print in red (in IDLE at least) all the exceptions. Is there a way to just not print the exceptions (but leave in any text I print using the <code>print</code> keyword?</p>
  
  <p>For example, I have text to print in a <code>tearDownClass()</code> function, and while I'd like that to print, it'd be nice if it wasn't followed by 30 lines of red exception text. Is this possible?</p>