Update app.py

app.py

@@ -105,7 +105,7 @@ def generate_and_evaluate(new_question, user_answer):
         model="gpt-4o",
         messages=[
             {"role": "system", "content": "You are a world history grader."},
-            {"role": "user", "content": f"Evaluate the following answer:\n\nQuestion: {new_question}\nAnswer: {user_answer}\n\nProvide a score between 0 and 100, taking into account partial correctness. Only return the numerical score."}
+            {"role": "user", "content": f"Evaluate the following answer:\n\nQuestion: {new_question}\nAnswer: {user_answer}\n\nProvide a score between 0 and 100, taking into account partial correctness. Only return the numerical score.If it's blank, please make it 0."}
         ],
         max_tokens=100
     )