code: def test_execute(ray_start_2_cpus):
      wg = WorkerGroup(num_workers=2)
      outputs = wg.execute(lambda: 1)
      assert len(outputs) == 2
      assert all(o == 1 for o in outputs)
  
imports: import time
  from collections import defaultdict
  import pytest
  import ray
  import ray._private.ray_constants
  from ray.train._internal.worker_group import Worker, WorkerGroup, WorkerMetadata
label_desc: Use image node_id 11 for calling a global function with example usage: test_execute(ray_start_2_cpus) without return types