Added on type hint

src/data_synthesis/test_question_generator.py

@@ -90,7 +90,7 @@ def save_questions_to_json(questions: List[str]) -> None:
         json.dump(data, fp=f, indent=2)
 
 
-def generate_questions(n: int = 100):
+def generate_questions(n: int = 100) -> None:
     """
     Generate n questions and overwrite the test_questions.json question bank
     """