Get the index of the answer that was given to `question`

        See the documentation for :meth:`~.get_user_question` for important
        caveats about the use of this function.

        :param question: The question whose `answer_id` should be retrieved.
        :type question: :class:`~okcupyd.question.BaseQuestion`
        :param fast: Don't try to look through the users existing questions to
                     see if arbitrarily answering the question can be avoided.
        :type fast: bool
        :param bust_questions_cache: :param bust_questions_cache: clear the
                                     :attr:`~okcupyd.profile.Profile.questions`
                                     attribute of this users
                                     :class:`~okcupyd.profile.Profile`
                                     before looking for an existing answer.
                                     Be aware that even this does not eliminate
                                     all race conditions.
        :type bust_questions_cache: bool

def get_question_answer_id(self, question, fast=False,
                               bust_questions_cache=False):
        """Get the index of the answer that was given to `question`

        See the documentation for :meth:`~.get_user_question` for important
        caveats about the use of this function.

        :param question: The question whose `answer_id` should be retrieved.
        :type question: :class:`~okcupyd.question.BaseQuestion`
        :param fast: Don't try to look through the users existing questions to
                     see if arbitrarily answering the question can be avoided.
        :type fast: bool
        :param bust_questions_cache: :param bust_questions_cache: clear the
                                     :attr:`~okcupyd.profile.Profile.questions`
                                     attribute of this users
                                     :class:`~okcupyd.profile.Profile`
                                     before looking for an existing answer.
                                     Be aware that even this does not eliminate
                                     all race conditions.
        :type bust_questions_cache: bool
        """
        if hasattr(question, 'answer_id'):
            # Guard to handle incoming user_question.
            return question.answer_id

        user_question = self.get_user_question(
            question, fast=fast, bust_questions_cache=bust_questions_cache
        )
        # Look at recently answered questions
        return user_question.get_answer_id_for_question(question)