code: def reset(self):
      self.sum = [0] * self.n_buckets
      self.n = [0] * self.n_buckets
      self.count = [0] * self.n_buckets
      self.start_time = None
  
imports: import argparse
  import ast
  import os
  import signal
  import threading
  import time
  from typing import Dict, List, Optional, Union
  import torch
  from fairseq import distributed_utils, tasks, utils
  from pytorch_translate.file_io import PathManager
label_desc: Use image node_id 4 for calling the BucketStopwatchMeter obj's underlying member method code with example usage: obj.reset() without return types