code: def __init__(self, values, constant_metric):
      super().__init__()
      self.values = values
      self.constant_metric = constant_metric
  
imports: from poutyne import Callback
label_desc: Use image node_id 1 to create a new ConstantMetricCallback object from inherited base classes: Callback with example: obj = ConstantMetricCallback(values, constant_metric)