code: def __call__(self, y_pred, y_true):
      for i, _ in enumerate(y_true):
          # positive
          if y_true[i] == 1:
              if y_true[i] == y_pred[i]:
                  self.TP += 1
              else:
                  self.FN += 1
          # Negative
          else:
              if y_true[i] == y_pred[i]:
                  self.TN += 1
              else:
                  self.FP += 1
  
imports: import numpy
  from absl import logging
  import delta.compat
  from delta import utils
  from delta.utils.register import registers
  from delta.utils.register import import_all_modules_for_register
  from delta.serving.base_frozen_model import Evaluater
label_desc: Use image node_id 2 for calling the ClsMetric obj's underlying member method code with example usage: obj.__call__(y_pred, y_true) without return types