Update app.py

app.py

@@ -152,6 +152,8 @@ def predict(_chatbot, task_history) -> tuple:
     else:
         _chatbot[-1] = (chat_query, response)
 
+    task_history[-1] = _chatbot[-1]
+
     return _chatbot, task_history
 
 def save_uploaded_image(image_file, upload_dir):
@@ -180,12 +182,15 @@ def regenerate(_chatbot, task_history) -> list:
     return predict(_chatbot, task_history)
 
 def add_text(history, task_history, text) -> tuple:
+    if not text.strip():
+        return history, task_history, ""
     task_text = text
     if len(text) >= 2 and text[-1] in PUNCTUATION and text[-2] not in PUNCTUATION:
         task_text = text[:-1]
-        history = history + [(_parse_text(text), None)]
-        task_history = task_history + [(task_text, None)]
-        return history, task_history, ""
+    history_item = (_parse_text(task_text), None)
+    history.append(history_item)
+    task_history.append(history_item)
+    return history, task_history, ""
 
 def add_file(history, task_history, file):
     if file is None: