code: def gen_sample(n):
      rbox = np.random.rand(n, 5)
      rbox[:, 0:4] = rbox[:, 0:4] * 0.45 + 0.001
      rbox[:, 4] = rbox[:, 4] - 0.5
      return rbox
  
file_path: PaddleDetection/ppdet/ext_op/unittest/test_rbox_iou.py
imports: import numpy
  import sys
  import time
  from shapely.geometry import Polygon
  import paddle
  import unittest
  from ext_op import rbox_iou
label_desc: Use image node_id 4 for calling a global function with example usage: gen_sample(n) and returns: rbox