Question

这是我的代码

class Shape(object):
    def __init__(self, coords):
        super(Shape, self).__init__()
        self._coords = list(map(list, coords))

    def move(self,distance):
        self._coords = distance

    def __getitem__(self,key):
        return self._coords[key]

class Point(Shape):
    def __init__(self,coords):
        super(Point, self).__init__(coords)



if __name__ == '__main__':

    p = Point((0, 0))

    p.move((1, 1))
    assert p[0, 0], p[0, 1] == (1, 1)

基本上，我想从父类Shape中创建一个子类Point。形状的初始部分应保持不变，并尝试创建一个新点并通过“主要”项下的测试。

此代码现在变为错误TypeError：'int'对象不可迭代

作为Python的初学者，我对解决方案感到困惑。我可以将哪些参数传递给_coords以被接受？如何连接点和形状？

Answer 1

class Shape(object):
    def __init__(self, coords):
        super(Shape, self).__init__()
        self._coords = list(map(list, [coords]))   # <--- to have it iterable enclose it in []

    def move(self,distance):
        self._coords = distance

    def __getitem__(self,key):
        return self._coords[key]

class Point(Shape):
    def __init__(self,coords):
        super(Point, self).__init__(coords)



if __name__ == '__main__':

    p = Point((0, 0))

    p.move((1, 1))
    # the self._coords is a list, so fetch them by index like
    assert p[0], p[1] == (1, 1)

TypeError：'int'对象不可迭代（list（map））

1 个答案: