如何在Python中设计类？

class Person:
    # 类变量
    count = 0

    # 初始化方法
    def __init__(self, name, age):
        self.name = name
        self.age = age
        Person.count += 1

    # 实例方法
    def introduce(self):
        print(f"My name is {self.name}, I am {self.age} years old.")

    # 类方法
    @classmethod
    def get_count(cls):
        return cls.count

person1 = Person("Alice", 25)
person2 = Person("Bob", 30)

person1.introduce()  # 输出：My name is Alice, I am 25 years old.
person2.introduce()  # 输出：My name is Bob, I am 30 years old.

print(Person.get_count())  # 输出：2