Update app.py

app.py

@@ -52,4 +52,72 @@ def check_answer(topic, user_code):
         feedback = response.choices[0].message['content'].strip()
         return feedback
     except Exception as e:
-        return f"Error: {s
+        return f"Error: {str(e)}"
+
+def respond(message, chat_history):
+    if chat_history is None:
+        chat_history = []
+    
+    # Check if this is the first message to set the topic
+    if len(chat_history) == 0:
+        topic = message
+        question = generate_exercise_question(topic)
+        chat_history.append((message, question))
+        return "", chat_history, chat_history, topic, None
+    else:
+        chat_history.append((message, "Please answer the question or type 'next' for another question on the same topic."))
+        return "", chat_history, chat_history, "", None
+
+def submit_code(topic, user_code, chat_history):
+    feedback = check_answer(topic, user_code)
+    chat_history.append((user_code, feedback))
+    return "", chat_history, chat_history, "", None
+
+def undo(chat_history):
+    if chat_history:
+        chat_history.pop()
+    return chat_history
+
+def clear():
+    return [], [], "", ""
+
+# Create the Gradio interface
+with gr.Blocks() as demo:
+    gr.Markdown("# Python Tutor")
+    gr.Markdown("Helps you learn Python using the latest documentation.")
+
+    chatbot = gr.Chatbot(label="Python Tutor")
+    state = gr.State([])
+    topic_state = gr.State("")
+
+    with gr.Row():
+        with gr.Column():
+            user_input = gr.Textbox(
+                show_label=False,
+                placeholder="Type the Python topic you want to learn about...",
+                lines=1
+            )
+            submit_button = gr.Button("Submit")
+            code_input = gr.Code(language="python", lines=10)
+            code_submit_button = gr.Button("Submit Code")
+            undo_button = gr.Button("Undo")
+            clear_button = gr.Button("Clear")
+
+        submit_button.click(respond, [user_input, state], [user_input, state, chatbot, topic_state])
+        code_submit_button.click(submit_code, [topic_state, code_input, state], [code_input, state, chatbot, topic_state])
+        undo_button.click(undo, state, chatbot)
+        clear_button.click(clear, None, [chatbot, state, topic_state])
+
+    examples = [
+        ["lists"],
+        ["decorators"],
+        ["dictionaries"],
+        ["file handling"],
+        ["classes and objects"]
+    ]
+
+    # Add examples
+    gr.Examples(examples=examples, inputs=[user_input])
+
+# Launch the app
+demo.launch()