code: def ray_start_regular(request):  # pragma: no cover
      try:
          yield ray.init(num_cpus=16)
      finally:
          ray.shutdown()
  
file_path: ray/python/ray/data/tests/test_mars.py
imports: import mars
  import mars.dataframe
  import pyarrow
  import pytest
  import ray
  from ray.data.tests.test_execution_optimizer import _check_usage_record
label_desc: Use image node_id 1 for calling a global function with example usage: ray_start_regular(request) without return types