def shuffle_mcq()

in yourbench/utils/parsing_engine.py [0:0]

• 18 lines of code
• 5 McCabe index (conditional complexity)

def shuffle_mcq(question_dict: dict) -> dict:
    """
    Shuffles MCQ choices randomly and ensures the correct answer is placed under a random label A-D.
    The final choices are labeled A., B., C., D. in order, but the correct answer may be under any of them.
    """
    labeled_choices = question_dict.get("choices", [])
    answer_letter = question_dict.get("answer", "").strip().upper()

    if not labeled_choices or not answer_letter:
        return question_dict

    # Extract raw text (removing A., B., etc.)
    raw_choices = [choice[3:].strip() for choice in labeled_choices]
    answer_index = ord(answer_letter) - ord("A")
    answer_choice_text = raw_choices[answer_index]

    # Shuffle the raw choices randomly
    seed_input = repr((raw_choices, answer_letter))
    seed = int(hashlib.sha256(seed_input.encode()).hexdigest(), 16)

    rng = random.Random(seed)
    rng.shuffle(raw_choices)

    # Find new index of the correct choice
    new_correct_index = raw_choices.index(answer_choice_text)
    new_answer_letter = chr(ord("A") + new_correct_index)

    # Re-label as A., B., C., D.
    labeled_shuffled = [f"({chr(ord('A') + i)}) {text}" for i, text in enumerate(raw_choices)]

    # Update the question dict
    question_dict["choices"] = labeled_shuffled
    question_dict["answer"] = new_answer_letter

    return question_dict