class Count(object):
    def __init__(self, start=0, step=1, stop=10):
        self.n = start
        self.step = step
        self.stop = stop

    def __next__(self):
        n = self.n
        if n>self.stop:
            raise StopIteration()
        self.n += self.step
        return n
    def __iter__(self):
        return self