code: def cmd_debug(self, argv, help):
          parser = argparse.ArgumentParser(
              prog="%s debug" % self.progname,
              description=help,
          )
          instances = self.instances
          parser.add_argument("instance", nargs=1,
                              metavar="instance",
                              help="Name of the instance from the config.",
                              choices=sorted(instances))
          parser.add_argument("-v", "--verbose", dest="verbose",
                              action="store_true", help="Print more info and output the startup script")
          parser.add_argument("-c", "--console-output", dest="console_output",
                              action="store_true", help="Prints the console output of the instance if available")
          parser.add_argument("-i", "--interactive", dest="interactive",
                              action="store_true", help="Creates a connection and drops you into an interactive Python session")
          parser.add_argument("-r", "--raw", dest="raw",
                              action="store_true", help="Outputs the raw possibly compressed startup script")
          parser.add_argument("-o", "--override", nargs="*", type=str,
                              dest="overrides", metavar="OVERRIDE",
                              help="Option to override instance config for startup script (name=value).")
          args = parser.parse_args(argv)
          overrides = self._parse_overrides(args)
          overrides['instances'] = self.instances
          instance = instances[args.instance[0]]
          if hasattr(instance, 'startup_script'):
              startup_script = instance.startup_script(overrides=overrides, debug=True)
              max_size = getattr(instance, 'max_startup_script_size', 16 * 1024)
              log.info("Length of startup script: %s/%s", len(startup_script['raw']), max_size)
              if args.verbose:
                  if 'startup_script' in instance.config:
                      if startup_script['original'] == startup_script['raw']:
                          log.info("Startup script:")
                      elif args.raw:
                          log.info("Compressed startup script:")
                      else:
                          log.info("Uncompressed startup script:")
                  else:
                      log.info("No startup script specified")
              if args.raw:
                  print(startup_script['raw'], end='')
              elif args.verbose:
                  print(startup_script['original'], end='')
          if args.console_output:
              if hasattr(instance, 'get_console_output'):
                  print(instance.get_console_output())
              else:
                  log.error("The instance doesn't support console output.")
          if args.interactive:
              import readline
              from pprint import pprint
              local = dict(
                  ctrl=self,
                  instances=self.instances,
                  instance=instance,
                  pprint=pprint)
              readline.parse_and_bind('tab: complete')
              try:
                  import rlcompleter
                  readline.set_completer(rlcompleter.Completer(local).complete)
              except ImportError:
                  pass
              __import__("code").interact(local=local)