Update app.py

app.py

@@ -45,20 +45,25 @@ def _parse_text(text):
     return text
     
 def predict(_chatbot, task_history, user_input):
-    query = user_input if user_input else task_history[-1][0]
+    # Ensure task_history is a list of tuples
+    if not isinstance(task_history, list) or not all(isinstance(item, tuple) and len(item) == 2 for item in task_history):
+        print("Error: task_history should be a list of tuples of length 2.")
+        return _chatbot
+
+    query = user_input if user_input else (task_history[-1][0] if task_history else "")
     print("User: " + _parse_text(query))
+
     if not task_history:
         return _chatbot
+
     history_cp = copy.deepcopy(task_history)
     history_filter = []
     audio_idx = 1
     pre = ""
     last_audio = None
-    for item in task_history:
-        if len(item) != 2:
-            print(f"Error: Expected a tuple of length 2, but got {item}")
-            continue
-        q, a = item  
+
+    for item in history_cp:
+        q, a = item
         if isinstance(q, (tuple, list)):
             last_audio = q[0]
             q = f'Audio {audio_idx}: <audio>{q[0]}</audio>'