title: Adding custom handler to Python logging module without a logger instance?
body: <p>This is a follow-up question to the answer <a href="https://stackoverflow.com/questions/14349563/how-to-get-non-blocking-real-time-behavior-from-python-logging-module-output-t/14353888#14353888">How to get non-blocking/real-time behavior from Python logging module? (output to PyQt QTextBrowser)</a> provided by <a href="https://stackoverflow.com/users/1006989/x-jacobs">X.Jacobs</a>.</p>
  
  <p>In the Python logging module, the normal method of adding a custom handler is to define a handler class that inherits from <code>logging.Handler</code> (we'll call this <code>CustomLogHandler</code>). To attach it to <code>logging</code> process, we typically do this:</p>
  
  <pre><code>import logging
  
  class CustomLogHandler(logging.Handler):
      ... (some code here)...
  
  logger = logging.getLogger()
  logger.addHandler(CustomLogHandler)
  </code></pre>
  
  <p>where <code>addHandler</code> is a method of the <code>logger</code> instance. </p>
  
  <p><strong>Question</strong>: Suppose we <strong>didn't</strong> want to get a <code>logger</code> (i.e. we <strong>don't want</strong> to do the above). Is is possible to attach the <code>CustomLogHandler</code> to <code>logging</code> itself?</p>
  
  <p>See comments in <a href="https://stackoverflow.com/questions/14349563/how-to-get-non-blocking-real-time-behavior-from-python-logging-module-output-t/14353888#14353888">How to get non-blocking/real-time behavior from Python logging module? (output to PyQt QTextBrowser)</a> for context.</p>
  
  <p>The premise is that it is possible to use custom handlers without any reference to the <code>logger</code> instance.</p>