重写Python中的类属性

Question

最终希望创建一个随机音乐规模发生器。我正在为每种模式构建类，并希望使用主尺度或小尺度作为真或假boolyan作为起点。
有人能告诉我覆盖Mode2的这个属性有什么进展吗？在

这是我的代码：

class Mode():

    def __init__(self,title,major):
        self.title = title
        self.major= True


    def __str__(self):
        return "Title: {}, Major: {}".format(self.title,self.major)


Mode1 = Mode("Ionian", "Major")
print(Mode1)

class Mode2(Mode):
    def major(self):
        print(False)


Mode2 = Mode("Dorian", "Minor")
print(Mode2)

Answer 1

尝试一个更规范的设计。首先，我修改了变量和属性以反映python命名约定：major=>；ismajor、canonical case等

在此基础上，我编写了一个子类初始化，它调用父类的init，然后进行所需的更改。不过，我对major参数有点困惑：忽略它并根据所使用的类强制大多数参数。不管怎样，以下是我对你的设计进行修改的结果：

class Mode():

    def __init__(self,title,ismajor):
        self.title = title
        self.ismajor= True

    def __str__(self):
        return "Title: {}, Major: {}".format(self.title,self.ismajor)


class Mode2(Mode):

    def __init__(self,title,ismajor):
        super().__init__(title, ismajor)
        self.ismajor= False


mode1 = Mode("Ionian", "Major")
print(mode1)

mode2 = Mode2("Dorian", "Minor")
print(mode2)

输出：

^{pr2}$

---

如果我这样做，我会更简化：去掉不同的模式类，并参数化一个类：

legal_mode = [ 
    "Ionian",
    "Dorian",
    "Phrygian",
    "Lydian",
    "Mixolydian",
    "Aeolian",
    "Locrian"
]
stepping = [2, 2, 1, 2, 2, 2, 1]
major_mode = ["Ionian"]


class Mode():

    def __init__(self,title):
        self.title = title
        self.ismajor = title in major_mode
        tonic = legal_mode.index(title)
        self.stepping = stepping[tonic:] + stepping[:tonic]

    def __str__(self):
        return "Title: {}, Major: {}".format(self.title, self.ismajor)

    def scale_steps(self):
        return "Half-steps: {}".format(' '.join(str(c) for c in self.stepping))

mode1 = Mode("Ionian")
print(mode1)
print(mode1.scale_steps())

mode2 = Mode("Dorian")
print(mode2)
print(mode2.scale_steps())

输出：

Title: Ionian, Major: True
Half-steps: 2 2 1 2 2 2 1
Title: Dorian, Major: False
Half-steps: 2 1 2 2 2 1 2