Question

我有一个名为Question的课程，如下所示

class Question:
    q_count = 0
    def __init__(self, s_id, q_id, question):
        print("q count is ", Question.q_count)       
        self._s_id = s_id
        self._question_text = question
        self._answers = []
        self._q_id = Question.q_count

    def get_answers(self):
        return self._answers

    def set_answers(self,answers):
        self._answers = answers

    def add_answer(self, Answer()):
        self._answers.append(Answer())

我希望它有一个名为_answers的列表，它是一个Answer对象列表。答案是我创建的另一种类型。

class Answer:
    def __init__(self, q_id, a_id):
        self._q_id = q_id
        self._a_id = a_id



# Subclass for multiple choice
class MC_Answer(Answer):
    def __init__(self, q_id, a_id, answer_text):
        Answer.__init__(self, q_id, a_id)
        self._answer_text = answer_text

    def get_answer_text(self):
        return self._answer_text

    def set_answer_text(self, a_id):
        self._a_id = a_id;

在我的代码的另一部分中，我正在创建一个MC_Answer对象的实例。我还有一个问题对象的实例。如何将其附加到答案列表中？

        answer1 = MC_Answer(idQ, 1, answer_text)
        new_q.add_answer(answer1)
        write_to_file(alist1, "answers.csv")

这是错误的，但如果我没有将answer1作为参数，那么Python如何知道添加该特定答案的实例？

Answer 1

您的添加答案类从不使用参数，而是创建Answer类的新实例并将其附加到列表中，而是需要修改它以为其提供参数然后正确使用

def add_answer(self, Answer()):
    self._answers.append(Answer())

应该是

def add_answer(self, answer):
    self._answers.append(answer)

Python在另一个类中添加类列表

1 个答案: