code: def forward(input_, target):
      return lovasz_hinge(input_, target)
  
imports: import torch
  from torch.autograd import Variable
  import torch.nn.functional
  import numpy
label_desc: Use image node_id 1 for calling the LovaszBinaryLoss obj's underlying member method code with example usage: obj.forward(input_, target) and returns: lovasz_hinge