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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def runserver(**config):
 """ 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. """

    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)