code: def num_params(self):
      return 2
  
file_path: AIF360/aif360/algorithms/inprocessing/celisMeta/StatisticalRate.py
imports: import numpy
  from aif360.algorithms.inprocessing.celisMeta.General import General
label_desc: Use image node_id 4 for calling the StatisticalRate obj's underlying member method code with example usage: obj.num_params() and returns: int