code: def cw_loss(input, target, reduction="elementwise_mean"):
      loss = clamp(elementwise_margin(input, target) + 50, 0.0)
      return _reduce_loss(loss, reduction)
  
imports: import torch
  from torch.nn.modules.loss import _Loss
  from advertorch.utils import clamp
label_desc: Use image node_id 4 for calling a global function with example usage: cw_loss(input, target, reduction) and returns: _reduce_loss