code: def is_iterable(x):
      return isinstance(x, (tuple, list))
  
imports: import torch
  from .utils import th_matrixcorr
  from .meters.averagemeter import AverageMeter
  from .callbacks import Callback
  from .losses import lovaszloss, hingeloss, dice_coeff
label_desc: Use image node_id 1 for calling a global function with example usage: is_iterable(x) and returns: isinstance