code: def width(self):
      return np.max(self.rect[2] - self.rect[0], 0)
  
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 7 for calling the ObjectRect obj's underlying member method code with example usage: obj.width() and returns: np