error handling

app.py

@@ -53,6 +53,7 @@ def bot(history):
     return history
 
 def infer(question, history):
+    try:
     res = []
     for human, ai in history[:-1]:
         pair = (human, ai)
@@ -62,11 +63,14 @@ def infer(question, history):
     query = question
     result = qa({"question": query, "chat_history": chat_history, "system:":"This is a world-class summarizing AI, be helpful."})
     return result["answer"]
+    except Exception as e:
+        return f"Error querying chatbot: {str(e)}"
 
 def auto_clear_data():
-    global qa, last_interaction_time
+    global qa, da, last_interaction_time
     if time.time() - last_interaction_time > 600:
         qa = None
+        db = None
 
 def periodic_clear():
     while True: