如何组织python类，使所有成员变量都在顶部附近？

class MyClass:
    def __init__(self):
        self.variable1 = 10
        self.variable2 = "Hello"
        self.variable3 = True

    def method1(self):
        # 方法定义

    def method2(self):
        # 方法定义

# 创建对象并访问成员变量
obj = MyClass()
print(obj.variable1)
print(obj.variable2)
print(obj.variable3)

class MyClass:
    variable1 = 10
    variable2 = "Hello"
    variable3 = True

    def method1(self):
        # 方法定义

    def method2(self):
        # 方法定义

# 创建对象并访问成员变量
obj = MyClass()
print(obj.variable1)
print(obj.variable2)
print(obj.variable3)