code: def test_keypoint_detection4(self):
      results = self.module.keypoint_detection(
          images=[cv2.imread("tests/test.jpg")], use_gpu=True
      )
      kps = results[0]["data"]
      self.assertIsInstance(kps, dict)
  
file_path: PaddleHub/modules/image/keypoint_detection/human_pose_estimation_resnet50_mpii/test.py
imports: import os
  import shutil
  import unittest
  import cv2
  import requests
  import paddlehub
label_desc: Use image node_id 6 for calling the TestHubModule obj's underlying member method code with example usage: obj.test_keypoint_detection4() without return types