code: def runserver(**config):
      
      active_config = {k: v for k, v in config.items() if v is not None}
      setup_logging(config['verbose'])
      try:
          run_app(*_runserver(**active_config))
      except AiohttpDevException as e:
          if config['verbose']:
              tb = click.style(traceback.format_exc().strip('\n'), fg='white', dim=True)
              main_logger.warning('AiohttpDevException traceback:\n%s', tb)
          main_logger.error('Error: %s', e)
          sys.exit(2)
docs: Run a development server for an aiohttp apps.
  
      Takes one argument "app-path" which should be a path to either a directory containing a recognized default file
      ("app.py" or "main.py") or to a specific file. Defaults to the environment variable "AIO_APP_PATH" or ".".
  
      The app path is run directly, see the "--app-factory" option for details on how an app is loaded from a python
      module.