class_docstr: Statistics for binary decision,
  including precision, recall, false positive, false negative
code: def reset(self):
      self.nr_pos = 0  # positive label
      self.nr_neg = 0  # negative label
      self.nr_pred_pos = 0
      self.nr_pred_neg = 0
      self.corr_pos = 0  # correct predict positive
      self.corr_neg = 0
  
imports: import numpy
label_desc: Use image node_id 2 for calling the BinaryStatistics obj's underlying member method code with example usage: obj.reset() without return types