Update app.py

app.py

@@ -9,7 +9,7 @@ from openai import Completion as complete
 
 mcq_prompt = "Generate French MCQs on the above text. Each MCQ must have four choices. Generate ten questions with answers:"
 
-openai.api_key = os.environ[openai_api_key]
+openai.api_key = os.environ["openai_api_key"]
 
 def generate_questions(context, mcq_prompt=mcq_prompt):
     """