ADT抽象数据类型名 {数据对象 数据关系 基本运算 }ADT抽象数据类型名 以以上的形式，用python语言，写出复数的抽象数据类型

ADT（Abstract Data Type，抽象数据类型）是描述一组数据以及与这些数据相关操作的抽象模型。针对复数这一抽象数据类型，我们可以按照上述的形式来设计：

class ComplexNumber(ADT):
    # 数据对象（数据）
    def __init__(self, real=0, imag=0):
        self.real = real
        self.imaginary = imag
    
    # 数据关系（属性）
    @property
    def magnitude(self):
        return (self.real ** 2 + self.imaginary ** 2) ** 0.5
    
    @property
    def phase(self):
        return math.atan2(self.imaginary, self.real)

    # 基本运算
    def add(self, other):
        return ComplexNumber(self.real + other.real, self.imaginary + other.imaginary)
    
    def subtract(self, other):
        return ComplexNumber(self.real - other.real, self.imaginary - other.imaginary)
    
    def multiply(self, other):
        real = self.real * other.real - self.imaginary * other.imaginary
        imaginary = self.real * other.imaginary + self.imaginary * other.real
        return ComplexNumber(real, imaginary)
    
    def divide(self, divisor):
        denominator = divisor.magnitude ** 2
        real = (self.real * divisor.real + self.imaginary * divisor.imaginary) / denominator
        imaginary = (self.imaginary * divisor.real - self.real * divisor.imaginary) / denominator
        return ComplexNumber(real, imaginary)
    
    #