首先我们需要明白无论是classonlymethod还是classmethod，本质都是一个类，而classonlymethod继承了classmethod。
classonlymethodz作用:只能被类调用，不能被实例对象调用。
class classonlymethod(classmethod): # 继承classmethod def __get__(self, instance, cls=None): # if instance is not None: raise AttributeError("This method is available only on the class, not on instances.") return super(classonlymethod, self).__get__(instance, cls)
his method is available only on the class, not on instances.面向对象中的@classonlymethod 与 @classmethod的区别
原文：https://www.cnblogs.com/Dream-huang/p/9409678.html