code: def test_completion_text_openai():
      try:
          # litellm.set_verbose = True
          response = completion(
              model="gpt-3.5-turbo-instruct", messages=messages
          )
          print(response["choices"][0]["message"]["content"])
      except Exception as e:
          print(e)
          pytest.fail(f"Error occurred: {e}")
  
imports: import sys, os
  import traceback
  from dotenv import load_dotenv
  import os, io
  import pytest
  import litellm
  from litellm import embedding, completion, completion_cost, Timeout
  from litellm import RateLimitError
  import openai
label_desc: Use image node_id 16 for calling a global function with example usage: test_completion_text_openai() without return types