Update app.py

app.py

@@ -44,14 +44,16 @@ def _parse_text(text):
     text = "".join(lines)
     return text
     
-def predict(_chatbot, task_history, user_input):
-    print("Predict - Start: task_history =", task_history)
+
+def predict(_chatbot, task_history_str, user_input):
+    print("Predict - Start: task_history_str =", task_history_str)
+    task_history = parse_task_history(task_history_str)
+
     print("Type of user_input:", type(user_input))
     print("Type of task_history:", type(task_history))
-    if task_history is None or not isinstance(task_history, list):
-        task_history = [] 
-    else :
-        task_history = parse_task_history(task_history)
+
+    if not isinstance(task_history, list):
+        task_history = []
 
     print("Predict - Start: task_history =", task_history)
     if not isinstance(task_history, list) or not all(isinstance(item, tuple) and len(item) == 2 for item in task_history):