title: Turn on debug logging in python
body: <p>I'm trying to turn on debug logging in python 3.5.2:</p>
  
  <pre><code>import logging
  log = logging.getLogger('test')
  log.setLevel(logging.DEBUG)
  
  log.warn('warn')
  log.debug('debug')
  
  log.root.setLevel(logging.DEBUG)
  log.debug('debug again')
  </code></pre>
  
  <p>However, this only prints <code>warn</code>. What am I missing?</p>