code: def delete_metric(self, slug):
          
  
          # To remove all keys for a slug, I need to retrieve them all from
          # the set of metric keys, This uses the redis "keys" command, which is
          # inefficient, but this shouldn't be used all that often.
          prefix = "m:{0}:*".format(slug)
          keys = self.r.keys(prefix)
          self.r.delete(*keys)  # Remove the metric data
  
          # Finally, remove the slug from the set
          self.r.srem(self._metric_slugs_key, slug)
docs: Removes all keys for the given ``slug``.