Update app.py

app.py

@@ -96,7 +96,7 @@ def respond(message, api_key, max_tokens, top_p, temperature):
     if response.status_code == 200:
         response_json = response.json()
         assistant_reply = response_json["msq"]["message"][0]
-        history.append((message, assistant_reply, "You", "P-ALPLE", session[api_key]["avatar"], ASSISTANT_PIC_PATH))
+        history.append((message, assistant_reply, "You", "P-ALPLE", sessions[api_key]["avatar"], ASSISTANT_PIC_PATH))
         sessions[api_key]["history"] = history  
         return history, assistant_reply  
     else: