class People(object):
    country = 'china'
    #类方法，用classmethod类进行修饰
    @classmethod
    def getCountry(cls):
        return cls.country
p = People()
print(p.getCountry())
print(People.getCountry())

类方法：能够通过实例对象和类对象去访问类属性

类方法还有一个用途

class People(object):
    country = 'china'   #类属性
    #类方法，用classmethod来进行修饰
    @classmethod
    def getCountry(cls):
        return cls.country
    @classmethod
    def setCountry(cls,country):
        cls.country = country
p = People()
p.setCountry('japan')   #实例属性

print(p.getCountry())
print(People.getCountry())

静态方法

需要通过修饰器@staticmethod来进行修饰，静态方法不需要多定义参数

class People(object):
    country = 'china'

    @staticmethod
    #静态方法
    def getCountry():
        return People.country
p = People()
print(p.getCountry())
print(People.getCountry())

会报错

 class People(object):
    country = 'china'
    def getCountry():
        return People.country
    print(People.getCountry)