python的一道面试题 __call__ 的使用.

class Person:
    def __init__(self):
        self.age = 1

    def __call__(self, *args, **kwargs):
        print ‘age‘, self.age
        self.age += 1
        return self

person = Person()
person()()()
print type(person())

实例+()调用__call__,返回self,可实现循环调用.

知乎面试后端有问到.

C++/C 对语言而言的严格都才是足够高的.