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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 _commandline(repositories, port=8000, host="127.0.0.1", debug=False, cache=None, cache_path="./cache", redis=None):
 """ Run a CTS API from command line. .. warning:: This function should not be used in the production context :param repositories: :param port: :param ip: :param debug: :param cache: :param cache_path: :return: """


    if cache == "redis":
        nautilus_cache = RedisCache(redis)
        cache_type = "redis"
    elif cache == "filesystem":
        nautilus_cache = FileSystemCache(cache_path)
        cache_type = "simple"
    else:
        nautilus_cache = NullCache()
        cache_type = "simple"

    app = Flask("Nautilus")
    if debug:
        app.logger.setLevel(logging.INFO)

    resolver = NautilusCtsResolver(resource=repositories)
    nautilus = FlaskNautilus(
        app=app,
        resolver=resolver
        #parser_cache=WerkzeugCacheWrapper(nautilus_cache),
        #logger=None
    )
    nautilus.resolver.parse()
    app.run(debug=debug, port=port, host=host)