code: def ACC_calc(TP, TN, FP, FN):
      
      try:
          result = (TP + TN) / (TP + TN + FN + FP)
          return result
      except ZeroDivisionError:
          return "None"
docs: Calculate accuracy.
  
      :param TP: true positive
      :type TP : int
      :param TN: true negative
      :type TN : int
      :param FP: false positive
      :type FP : int
      :param FN: false negative
      :type FN : int
      :return: accuracy as float