title: python logging module is not writing anything to file
body: <p>I'm trying to write a server that logs exceptions both to the console and to a file. I pulled some code off the cookbook. Here it is:</p>
  
  <pre><code>logger = logging.getLogger('server_logger')
  logger.setLevel(logging.DEBUG)
  # create file handler which logs even debug messages
  fh = logging.FileHandler('server.log')
  fh.setLevel(logging.DEBUG)
  # create console handler with a higher log level
  ch = logging.StreamHandler()
  ch.setLevel(logging.ERROR)
  # create formatter and add it to the handlers
  formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s', datefmt='%Y-%m-%d %H:%M:%S')
  ch.setFormatter(formatter)
  fh.setFormatter(formatter)
  # add the handlers to logger
  logger.addHandler(ch)
  logger.addHandler(fh)
  </code></pre>
  
  <p>This code logs perfectly fine to the console, but nothing is logged to the file. The file is created, but nothing is ever written to it. I've tried closing the handler, but that doesn't do anything. Neither does flushing it. I searched the Internet, but apparently I'm the only one with this problem. Does anybody have any idea what the problem is? Thanks for your answers.</p>