code: def default():
      
  
      try:
          conn = get_connection()
          if conn.session:
              log.warning("configuring new default connection for cqlengine when one was already set")
      except:
          pass
  
      register_connection('default', hosts=None, default=True)
  
      log.debug("cqlengine connection initialized with default session to localhost")
docs: Configures the default connection to localhost, using the driver defaults
      (except for row_factory)