code: def _init_ray(self):
      if not ray.is_initialized():
          ray.init(address="auto")
  
imports: import ray
  from lightgbm_ray.tests.test_lightgbm_api import LightGBMAPITest
label_desc: Use image node_id 1 for calling the LightGBMDistributedAPITest obj's underlying member method code with example usage: obj._init_ray() without return types