Update app.py

app.py

@@ -196,7 +196,7 @@ def run_gpt_model(prompt: str, api_key: str) -> str:
         stream=True
     )
 
-    
+    collected_chunks = ""
     for chunk in response:
         collected_chunks += chunk.choices[0].delta.content or ""
         print(chunk.choices[0].delta.content or "",end="")