code: def __init__(self, sigma=1.0):
      super(WaveGlowLoss, self).__init__()
      self.sigma = sigma
  
imports: import copy
  import torch
  from torch.autograd import Variable
  import torch.nn.functional
label_desc: Use image node_id 1 to create a new WaveGlowLoss object from inherited base classes: torch.nn with example: obj = WaveGlowLoss(sigma)