Fix syntax3

app.py

@@ -1,6 +1,7 @@
 import os
 import logging
 import httpx
+import json
 from dotenv import load_dotenv
 import gradio as gr
 from typing import AsyncGenerator, List, Dict, Tuple
@@ -55,15 +56,20 @@ async def ask_openai(query: str, history: List[Dict[str, str]]) -> AsyncGenerato
                                 data = line[6:]  # Remove "data: " prefix
                                 if data == "[DONE]":
                                     break
+                                if not data.strip():
+                                    continue
                                 try:
-                                    json_data = eval(data)  # Safely parse JSON
+                                    json_data = json.loads(data)  # Safely parse JSON
                                     if "choices" in json_data and json_data["choices"]:
                                         delta = json_data["choices"][0].get("delta", {})
-                                        if "content" in delta:
+                                        if "content" in delta and delta["content"] is not None:
                                             yield delta["content"]
-                                except Exception as e:
-                                    logger.error(f"Error parsing OpenAI stream chunk: {str(e)}")
+                                except json.JSONDecodeError as e:
+                                    logger.error(f"Error parsing OpenAI stream chunk: {str(e)} - Data: {data}")
                                     yield f"Error parsing stream: {str(e)}"
+                                except Exception as e:
+                                    logger.error(f"Unexpected error in OpenAI stream: {str(e)} - Data: {data}")
+                                    yield f"Error in stream: {str(e)}"
 
     except httpx.HTTPStatusError as e:
         logger.error(f"OpenAI HTTP Status Error: {e.response.status_code}, {e.response.text}")