Write the points to the Prometheus exporter using Gauge.

def export(self, name, columns, points):
        """Write the points to the Prometheus exporter using Gauge."""
        logger.debug("Export {} stats to Prometheus exporter".format(name))

        # Remove non number stats and convert all to float (for Boolean)
        data = {k: float(v) for (k, v) in iteritems(dict(zip(columns, points))) if isinstance(v, Number)}

        # Write metrics to the Prometheus exporter
        for k, v in iteritems(data):
            # Prometheus metric name: prefix_<glances stats name>
            metric_name = self.prefix + self.METRIC_SEPARATOR + str(name) + self.METRIC_SEPARATOR + str(k)
            # Prometheus is very sensible to the metric name
            # See: https://prometheus.io/docs/practices/naming/
            for c in ['.', '-', '/', ' ']:
                metric_name = metric_name.replace(c, self.METRIC_SEPARATOR)
            # Get the labels
            labels = self.parse_tags(self.labels)
            # Manage an internal dict between metric name and Gauge
            if metric_name not in self._metric_dict:
                self._metric_dict[metric_name] = Gauge(metric_name, k,
                                                       labelnames=listkeys(labels))
            # Write the value
            if hasattr(self._metric_dict[metric_name], 'labels'):
                # Add the labels (see issue #1255)
                self._metric_dict[metric_name].labels(**labels).set(v)
            else:
                self._metric_dict[metric_name].set(v)