Python运算符重载

class Test:
    def __init__(self,name):
        self.name=name

    def __add__(self, other):
        return self.name + '+' +other.name

    def __lt__(self, other):#<的重载
        return '<<<'

    def __str__(self):
        return self.name*3

    def __len__(self):
        return 50

a=Test('a')
b=Test('b')
print(a+b)
print(a 
输出：
 
a+b
<<<
aaa
50