old_contents: import guv
  
  guv.monkey_patch()
  
  from cassandra.cluster import Cluster
  import logging
  import logger
  
  logger.configure()
  log = logging.getLogger()
  
  
  def main():
      nodes = ['192.168.20.2']
  
      cluster = Cluster(nodes, port=9042)
      session = cluster.connect('test')
      log.info('Execute commands')
      rows = session.execute('SELECT * FROM numbers')
  
      for row in rows:
          log.info(row)
  
      # FIXME: the current Cassandra support module hangs for unknown reasons, so hit ctrl-c now
      # see: https://github.com/veegee/guv/issues/10
      log.warn('The current Cassandra support module hangs for unknown reasons, so hit ctrl-c now')
      try:
          guv.sleep(600)
      except KeyboardInterrupt:
          pass
  
      cluster.shutdown()
  
  
  if __name__ == '__main__':
      main()
  
new_contents: """Cassandra database example
  
  This example demonstrates connecting to a Cassandra database and executing a query. Note that
  using the database driver remains exactly the same. The only  difference is that we're
  monkey-patching everything (including the Cassandra driver), making it guv-friendly.
  
  Adjust this example to your database address, keyspace, and query that you would like to run.
  """
  import guv
  
  guv.monkey_patch()
  
  from cassandra.cluster import Cluster
  import logging
  import logger
  
  logger.configure()
  log = logging.getLogger()
  
  
  def main():
      nodes = ['192.168.20.2']
  
      cluster = Cluster(nodes, port=9042)
      session = cluster.connect('test')
      log.info('Execute commands')
      rows = session.execute('SELECT * FROM numbers')
  
      for row in rows:
          log.info(row)
  
      # FIXME: the current Cassandra support module hangs for unknown reasons, so hit ctrl-c now
      # see: https://github.com/veegee/guv/issues/10
      log.warn('The current Cassandra support module hangs for unknown reasons, so hit ctrl-c now')
      try:
          guv.sleep(600)
      except KeyboardInterrupt:
          pass
  
      cluster.shutdown()
  
  
  if __name__ == '__main__':
      main()
  
subject: Add example module docstring