code: def incr_counter(self, *args, **kwargs):
          
          threshold = kwargs.get("threshold", self.batch_counter_default)
          if len(args) == 2:
              # backwards compatibility with existing hadoop jobs
              group_name, count = args
              key = (group_name,)
          else:
              group, name, count = args
              key = (group, name)
  
          ct = self._counter_dict.get(key, 0)
          ct += count
          if ct >= threshold:
              new_arg = list(key) + [ct]
              self._incr_counter(*new_arg)
              ct = 0
          self._counter_dict[key] = ct
docs: Increments a Hadoop counter.
  
          Since counters can be a bit slow to update, this batches the updates.