pollingtst.py

class Polling:
    def __init__(self, routine):
        self.routine = routine

    def __call__(self, *args, **kwargs):
        self.__last = self.routine(*args, **kwargs)
        return self.__last

    @property
    def last(self):
        return self.__last

if __name__ == '__main__':
    test = ['1st', '2nd', '3rd', '..more..']
    from itertools import cycle
    cycled = iter(cycle(test))

    @Polling
    def joy_sim(*args, **kwargs):
        print('\tcalled with', args, kwargs, end='')
        return next(cycled)

    for i in range(10):
        res = joy_sim(i)
        prev = joy_sim.last
        assert prev == res
        print(' Result:', res, '\t\tLast:', prev)

# Which gives:
##    called with (0,) {} Result: 1st 		Last: 1st
##    called with (1,) {} Result: 2nd 		Last: 2nd
##    called with (2,) {} Result: 3rd 		Last: 3rd
##    called with (3,) {} Result: ..more.. 		Last: ..more..
##    called with (4,) {} Result: 1st 		Last: 1st
##    called with (5,) {} Result: 2nd 		Last: 2nd
##    called with (6,) {} Result: 3rd 		Last: 3rd
##    called with (7,) {} Result: ..more.. 		Last: ..more..
##    called with (8,) {} Result: 1st 		Last: 1st
##    called with (9,) {} Result: 2nd 		Last: 2nd