make specific to shared course use

app.py

@@ -1,11 +1,12 @@
 import os
+from datetime import datetime
 
 import gradio as gr
 from datasets import load_dataset, Dataset
 from huggingface_hub import whoami
 
 
-EXAM_DATASET_ID = os.getenv("EXAM_DATASET_ID") or "burtenshaw/exam_questions"
+EXAM_DATASET_ID = os.getenv("EXAM_DATASET_ID") or "agents-course/unit_1_quiz"
 
 ds = load_dataset(EXAM_DATASET_ID, split="train")
 
@@ -36,10 +37,15 @@ def push_results_to_hub(user_answers, token: gr.OAuthToken | None):
         return
     else:
         gr.Info("Submitting answers to the Hub. Please wait...", duration=2)
+
     user_info = whoami(token=token.token)
-    repo_id = f"{user_info['name']}/quiz-responses"  # e.g. 'myUsername/quiz-responses'
+    repo_id = f"{EXAM_DATASET_ID}_student_responses"  # e.g. 'myUsername/quiz-responses'
+    submission_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
 
     new_ds = Dataset.from_list(user_answers)
+    new_ds = new_ds.map(
+        lambda x: {"username": user_info["name"], "datetime": submission_time}
+    )
     new_ds.push_to_hub(repo_id)
     gr.Success("Your responses have been submitted to the Hub!")
 
@@ -61,8 +67,17 @@ def handle_quiz(question_idx, user_answers, selected_answer, is_start):
         # If not the very first question, store the user's last selection
         if question_idx < len(quiz_data):
             current_q = quiz_data[question_idx]
+            correct_reference = current_q["correct_answer"]
+            correct_reference = f"answer_{correct_reference}".lower()
+            is_correct = selected_answer == current_q[correct_reference]
             user_answers.append(
-                {"question": current_q["question"], "selected_answer": selected_answer}
+                {
+                    "question": current_q["question"],
+                    "selected_answer": selected_answer,
+                    "correct_answer": current_q[correct_reference],
+                    "is_correct": is_correct,
+                    "correct_reference": correct_reference,
+                }
             )
         question_idx += 1