Python練習統計一個類一共建立了幾個對象

# 練習一個類一共建立了幾個對象
class Person():
    count = 0

    def __new__(cls, *args, **kwargs):
        cls.count += 1
        return object.__new__(cls)

    def __init__(self, name, age):
        self.name = name
        self.age = age


p1 = Person('zhangsan', 21)
p2 = Person('lisi', 18)
p3 = Person('wangwu', 23)

print(Person.count)

           

# 練習一個類一共建立了幾個對象
class Person():
    __count = 0

    def __new__(cls, *args, **kwargs):
        cls.__count += 1
        return object.__new__(cls)

    def __init__(self, name, age):
        self.name = name
        self.age = age

    @classmethod
    def get_count(cls):
        return cls.__count


p1 = Person('zhangsan', 21)
p2 = Person('lisi', 18)
p3 = Person('wangwu', 23)

print(Person.get_count())

           

# 練習一個類一共建立了幾個對象
class Person():
    count = 0

    def __init__(self, name, age):
        Person.count += 1
        self.name = name
        self.age = age


p1 = Person('zhangsan', 21)
p2 = Person('lisi', 18)
p3 = Person('wangwu', 23)

print(Person.count)