code: def test_runtime_context(shutdown_only):
      ray.init(namespace="abc")
      namespace = ray.get_runtime_context().namespace
      assert namespace == "abc"
      assert namespace == ray.get_runtime_context().get()["namespace"]
  
file_path: ray/python/ray/tests/test_namespace.py
imports: import sys
  import time
  import pytest
  import ray
  from ray._private import ray_constants
  from ray._private.test_utils import get_error_message, init_error_pubsub, run_string_as_driver
  from ray.cluster_utils import Cluster
label_desc: Use image node_id 7 for calling a global function with example usage: test_runtime_context(shutdown_only) without return types