code: def Log(self, format_str, *args):
      
      format_str = utils.SmartUnicode(format_str)
  
      status = format_str
      if args:
        try:
          # The status message is always in unicode
          status = format_str % args
        except TypeError:
          logging.error(
              "Tried to log a format string with the wrong number "
              "of arguments: %s", format_str)
  
      logging.info("%s: %s", self.session_id, status)
  
      self.context.status = utils.SmartUnicode(status)
  
      log_entry = rdf_flows.FlowLog(
          client_id=None,
          urn=self.session_id,
          flow_name=self.hunt_obj.__class__.__name__,
          log_message=status)
      logs_collection_urn = self.hunt_obj.logs_collection_urn
      with data_store.DB.GetMutationPool() as pool:
        grr_collections.LogCollection.StaticAdd(
            logs_collection_urn, log_entry, mutation_pool=pool)
docs: Logs the message using the hunt's standard logging.
  
      Args:
        format_str: Format string
        *args: arguments to the format string
  
      Raises:
        RuntimeError: on parent missing logs_collection