code: def __init__(self, args):
      super().__init__()
      self.args = args
      self.kl_weight = getattr(args, "kl_weight", 0.0)
  
imports: import math
  import torch
  from torch.nn.modules.loss import _Loss
label_desc: Use image node_id 1 to create a new HeadSelectionLoss object from inherited base classes: _Loss with example: obj = HeadSelectionLoss(args)