code: def flaky_step() -> str:
      import random
  
      if random.choice([0, 1, 1]) != 0:
          raise ValueError("oops")
  
      return "ok"
  
imports: from typing import Any, Tuple, Optional
  import ray
  from ray import workflow
label_desc: Use image node_id 1 for calling a global function with example usage: flaky_step() and returns: str