code: def repr(tick, pack=False):
      '''
      Return a date string for an epoch-millis timestamp.
  
      Args:
          tick (int): The timestamp in milliseconds since the epoch.
  
      Returns:
          (str):  A date time string
      '''
      if tick == 0x7fffffffffffffff:
          return '?'
  
      dt = datetime.datetime(1970, 1, 1) + datetime.timedelta(milliseconds=tick)
      millis = dt.microsecond / 1000
      if pack:
          return '%d%.2d%.2d%.2d%.2d%.2d%.3d' % (dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second, millis)
      return '%d/%.2d/%.2d %.2d:%.2d:%.2d.%.3d' % (dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second, millisf repr(tick, pack=False):
      '''
      Return a date string for an epoch-millis timestamp.
  
      Args:
          tick (int): The timestamp in milliseconds since the epoch.
  
      Returns:
          (str):  A date time string
      '''
      if tick == 0x7fffffffffffffff:
          return '?'
  
      dt = datetime.datetime(1970, 1, 1) + datetime.timedelta(milliseconds=tick)
      millis = dt.microsecond / 1000
      if pack:
          return '%d%.2d%.2d%.2d%.2d%.2d%.3d' % (dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second, millis)
      return '%d/%.2d/%.2d %.2d:%.2d:%.2d.%.3d' % (dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second, millis)
docs: Return a date string for an epoch-millis timestamp.
  
      Args:
          tick (int): The timestamp in milliseconds since the epoch.
  
      Returns:
          (str):  A date time string