Merge pull request #1760 from better629/main

hello_world example compatibility

Author: better629

examples/hello_world.py

@@ -14,7 +14,7 @@
 async def ask_and_print(question: str, llm: LLM, system_prompt) -> str:
     logger.info(f"Q: {question}")
     rsp = await llm.aask(question, system_msgs=[system_prompt], stream=True)
-    if llm.reasoning_content:
+    if hasattr(llm, "reasoning_content") and llm.reasoning_content:
         logger.info(f"A reasoning: {llm.reasoning_content}")
     logger.info(f"A: {rsp}")
     return rsp