def refresh_metrics(self):
"""
Get the latest metrics for the tunnel and update the ``metrics`` variable.
"""
logger.info("Refreshing metrics for tunnel: {}".format(
self.public_url))
data = api_request("{}{}".format(self.api_url, self.uri),
method="GET",
timeout=self.pyngrok_config.request_timeout)
if "metrics" not in data:
raise PyngrokError(
"The ngrok API did not return \"metrics\" in the response")
self.data["metrics"] = data["metrics"]
self.metrics = self.data["metrics"]
