code: def __call__(self, inputs, targets):
      assert len(self.loss_funcs) == len(targets) >= len(inputs)
  
      def zip_repeat(*args):
          longest = max(map(len, args))
          filled = [islice(cycle(x), longest) for x in args]
          return zip(*filled)
  
      return tuple(
          fn(x, y)
          for x, y, fn in zip_repeat(inputs, targets, self.loss_funcs)
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from itertools import cycle, islice
  from collections import abc
  import numpy
  import paddle
  import paddle.nn
  from ppdet.core.workspace import register, serializable
label_desc: Use image node_id 2 for calling the ZipLoss obj's underlying member method code with example usage: obj.__call__(inputs, targets) and returns: tuple, zip