class_docstr: Computes and stores the average and current value.
  
  Example:
      >>> stats = AverageMeter()
      >>> acc1 = torch.tensor(0.99) # coming from K.metrics.accuracy
      >>> stats.update(acc1, n=1)  # where n is batch size usually
      >>> round(stats.avg, 2)
      0.99
code: def reset(self) -> None:
      self.val = 0
      self._avg = 0
      self.sum = 0
      self.count = 0
  
imports: from typing import Union
  from kornia.core import Tensor
label_desc: Use image node_id 2 for calling the AverageMeter obj's underlying member method code with example usage: obj.reset() without return types