code: def some_batch_metric_1(y_pred, y_true):
      return torch.FloatTensor([some_metric_1_value])
  
imports: import numpy
  import torch
  from poutyne import Metric
label_desc: Use image node_id 3 for calling a global function with example usage: some_batch_metric_1(y_pred, y_true) and returns: torch