code: def Clement_calc(TP, FP, FN, TN):
      """
      Calculate Clement similarity.
  
      :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: Clement similarity as float
      """
      try:
          n = TP + FP + FN + TN
          term1 = (TP / (TP + FP)) * (1 - (TP + FP) / n)
          term2 = (TN / (FN + TN)) * (1 - (FN + TN) / n)
          return term1 + term2
      except Exception:
          return "None"
  
imports: from __future__ import division
  from enum import Enum
  import math
label_desc: Use image node_id 25 for calling a global function with example usage: Clement_calc(TP, FP, FN, TN) and returns: unknown, str