Changed page title and added error handling

app.py

@@ -8,15 +8,21 @@ from tutor import Tutor
 
 
 def submit_chat(tutor_ctx, message):
-    tutor = Tutor(context=tutor_ctx)
-    for history in tutor.chat(message):
-        yield [tutor.serialize(), history, None]
+    try:
+        tutor = Tutor(context=tutor_ctx)
+        for history in tutor.chat(message):
+            yield [tutor.serialize(), history, None]
+    except Exception as error:
+        raise gr.Error(str(error))
     
 
 def submit_code(tutor_ctx, editor, output):
-    tutor = Tutor(context=tutor_ctx)
-    for history in tutor.code(editor, output):
-        yield [tutor.serialize(), history, None]    
+    try:
+        tutor = Tutor(context=tutor_ctx)
+        for history in tutor.code(editor, output):
+            yield [tutor.serialize(), history, None]
+    except Exception as error:
+        raise gr.Error(str(error))
 
 
 def init_tutor(instructions, starter_code):
@@ -51,7 +57,7 @@ def load_level(request: gr.Request):
         return [instructions, starter_code]
 
 
-with gr.Blocks() as demo:
+with gr.Blocks(title="CS Tutor") as demo:
     tutor_ctx = gr.State()
     with gr.Row():
         instruction_panel = gr.Markdown()

tutor.py

@@ -18,7 +18,6 @@ class Tutor:
             self.deserialize(context)
         else:
             self.memory = []
-            # self.system_prompt = system_prompt(instructions, starter_code)
             self.instructions = instructions
             self.starter_code = starter_code
             self.memory.append(