为什么不加装饰器返回的是函数？
为什么不加装饰器返回的是函数？
<bound method Student.grade of <__main__.Student object at 0x7f70a1a2ce10>>
<bound method Student.grade of <__main__.Student object at 0x7f70a1a2ce10>>
<bound method Student.grade of <__main__.Student object at 0x7f70a1a2ce10>>
加了装饰器返回的就是字符串？
