code: def check_cv2(self):
      # conda install -c conda-forge opencv==3.4.2
      import cv2
  
      return cv2.__version__
  
file_path: analytics-zoo/pyzoo/test/zoo/ray/integration/ray_on_yarn.py
imports: import ray
  from zoo import init_spark_on_yarn
  from zoo.ray import RayContext
label_desc: Use image node_id 2 for calling the TestRay obj's underlying member method code with example usage: obj.check_cv2() and returns: cv2