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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 limit(self, limit_value, key_func=None, per_method=False, methods=None, error_message=None, exempt_when=None):
 """ decorator to be used for rate limiting individual routes. :param limit_value: rate limit string or a callable that returns a string. :ref:`ratelimit-string` for more details. :param function key_func: function/lambda to extract the unique identifier for the rate limit. defaults to remote address of the request. :param bool per_method: whether the limit is sub categorized into the http method of the request. :param list methods: if specified, only the methods in this list will be rate limited (default: None). :param error_message: string (or callable that returns one) to override the error message used in the response. :return: """

        return self.__limit_decorator(limit_value, key_func, per_method=per_method,
                                      methods=methods, error_message=error_message,
                                      exempt_when=exempt_when)