def __init__(self, subargs, optional=False):
        self.subargs = subargs
        Argument.__init__(self, optional)
Converts an existing observable sequence to a Future
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/protocols/amp.py/AmpList.__init__--crossover with--dataset/ETHPy150Open ReactiveX/RxPY/rx/linq/observable/tofuture.py/to_future