code: def initTestCase(self):
      self.n = 1000
  
file_path: PaddleDetection/ppdet/ext_op/unittest/test_matched_rbox_iou.py
imports: import numpy
  import sys
  import time
  from shapely.geometry import Polygon
  import paddle
  import unittest
  from ext_op import matched_rbox_iou
label_desc: Use image node_id 2 for calling the MatchedRBoxIoUTest obj's underlying member method code with example usage: obj.initTestCase() without return types