code: def iou(self, rect2):
      overlap = self.overlap(rect2)
      return overlap / (self.area() + rect2.area() - overlap)
  
imports: import csv
  import multiprocessing
  import os
  import re
  import nnabla.logger
  import numpy
  import tqdm
  from nnabla.utils.image_utils import imsave, imread, imresize
label_desc: Use image node_id 14 for calling the ObjectRect obj's underlying member method code with example usage: obj.iou(rect2) and returns: unknown