code: def evaluation(labels_pr, labels_gt, model):
      """Evaluation
  
      Args:
          labels_pr: predicted label
          labels_gt: ground truth label
          model: factor graph model
  
      Returns:
          ave_loss: average loss
      """
      num_train_samples = labels_pr.get_num_labels()
      acc_loss = 0.0
      ave_loss = 0.0
  
file_path: shogun/examples/undocumented/python/structure_graphcuts.py
imports: import numpy
  import itertools
  import shogun
label_desc: Use image node_id 4 for calling a global function with example usage: evaluation(labels_pr, labels_gt, model) without return types