class Try_str(str):
def __add__(self, other):
return int(self) + int(other)
def __sub__(self, other):
return int(self) - int(other)
'''
下面这些都可以进行运算符的重载
def __mul__(self, other): 乘法
def __truediv__(self, other):真除法,即/
def __floordiv__(self, other): 整除,即//
def __mod__(self, other): 取模 ,即%
def __divmod__(self, other): 定义当被divmod()调用时的行为,即,取余数
def __pow__(self, power, modulo=None): 定义当被power()调用或者**运算时的行为
def __lshift__(self, other): 定义左移
def __rshift__(self, other):右移
def __and__(self, other): 按位与
def __xor__(self, other): 按位异或
def __or__(self, other): 按位或
'''
if __name__ == '__main__':
a = Try_str('123')
b = Try_str('12')
print(a+b)
print(a-b)