<gh_stars>10-100
class EstacionesRadio():
    def __init__(self):
        self.estacion = [89.9,101.2,102.3,100.4]
        self.index = -1

    def __iter__(self):
        return self

    def __next__(self):
        self.index += 1
        if self.index == len(self.estacion):
            raise StopIteration

        return self.estacion[self.index]


r= EstacionesRadio()
itr=iter(r)
print(next(itr))
