def info(self, name, description, labelnames=None, labelvalues=None, **labels):
        """
        Report any information as a Prometheus metric.
        This will create a `Gauge` with the initial value of 1.

        The easiest way to use it is:

            metrics = PrometheusMetrics(app)
            metrics.info(
                'app_info', 'Application info',
                version='1.0', major=1, minor=0
            )

        If the order of the labels matters:

            metrics = PrometheusMetrics(app)
            metrics.info(
                'app_info', 'Application info',
                ('version', 'major', 'minor'),
                ('1.0', 1, 0)
            )

        :param name: the name of the metric
        :param description: the description of the metric
        :param labelnames: the names of the labels
        :param labelvalues: the values of the labels
        :param labels: the names and values of the labels
        :return: the newly created `Gauge` metric
        """

        if labels and labelnames:
            raise ValueError(
                'Cannot have labels defined as `dict` '
                'and collections of names and values'
            )

        if labelnames is None and labels:
            labelnames = labels.keys()

        elif labelnames and labelvalues:
            for idx, label_name in enumerate(labelnames):
                labels[label_name] = labelvalues[idx]

        gauge = Gauge(
            name, description, labelnames or tuple(),
            registry=self.registry
        )

        if labels:
            gauge = gauge.labels(**labels)

        gauge.set(1)

        return gauge
Report any information as a Prometheus metric.
        This will create a `Gauge` with the initial value of 1.

        The easiest way to use it is:

            metrics = PrometheusMetrics(app)
            metrics.info(
                'app_info', 'Application info',
                version='1.0', major=1, minor=0
            )

        If the order of the labels matters:

            metrics = PrometheusMetrics(app)
            metrics.info(
                'app_info', 'Application info',
                ('version', 'major', 'minor'),
                ('1.0', 1, 0)
            )

        :param name: the name of the metric
        :param description: the description of the metric
        :param labelnames: the names of the labels
        :param labelvalues: the values of the labels
        :param labels: the names and values of the labels
        :return: the newly created `Gauge` metric