Update app.py

app.py

@@ -498,7 +498,7 @@ def handsome_chat_completions():
                                         }]
                                     }
 
-                                    if "reasoning_content" in delta:
+                                    if delta.get("reasoning_content") is not None:
                                         if first_reasoning_chunk:
                                             openai_chunk["choices"][0]["delta"]["content"] = "<think>\n"
                                             yield f"data: {json.dumps(openai_chunk)}\n\n"
@@ -508,7 +508,7 @@ def handsome_chat_completions():
                                         yield f"data: {json.dumps(openai_chunk)}\n\n"
                                         reasoning_content_accumulated += delta["reasoning_content"]
 
-                                    if "content" in delta:
+                                    if delta.get("content") is not None:
                                         if not first_reasoning_chunk:
                                             openai_chunk["choices"][0]["delta"]["content"] = "\n</think>\n"
                                             yield f"data: {json.dumps(openai_chunk)}\n\n"