class Prograner(object):#定义一个类
    print("1")


    def __init__(self,name,age):#构造函数
        print("2")
        self.name=name
        if isinstance(age,int):
            self.age=age

        else:
            raise Exception("age must be int")


    def __eq__(self,other):
        print("3")
        if isinstance(other,Prograner):
            if self.age==other.age:
                return True
        else:
            raise Exception("the type of objact must be Prograne")
    def __add__(self, other):
        print("4")
        if isinstance (other,Prograner):
            return self.age+other.age

        else:
            raise Exception("The type fo object ")

if __name__==‘__main__‘
    print("hello")
    p1=Prograner("erfei",22)#实例化一个类
    p2=Prograner("bill",30)
    print(p1==p2)
    print(p1+p2)