Update app.py

app.py

@@ -75,11 +75,14 @@ def query_vectara(question):
 
     if response.status_code == 200:
         query_data = response.json()
-        # Extract summary and the first 5 sources
-        summary_text = query_data[0]["summary"]["text"]
-        sources = query_data[0]["responseSet"]["responseList"][:5]
-        sources_text = [source["text"] for source in sources]
-        return f"Summary: {summary_text}\n\nSources:\n{json.dumps(sources_text, indent=2)}"
+        if query_data:
+            # Extract summary and the first 5 sources
+            summary_text = query_data[0]["summary"]["text"]
+            sources = query_data[0]["responseSet"]["responseList"][:5]
+            sources_text = [source["text"] for source in sources]
+            return f"Summary: {summary_text}\n\nSources:\n{json.dumps(sources_text, indent=2)}"
+        else:
+            return "No data found in the response."
     else:
         return f"Error: {response.status_code}"