and in Python: def pipeeither(l): def pipeeither(v): return reduce(lambda a, e: e(a[1]) if a[0] is None else a, l, (None, v)) r

and in Python: def pipeeither(l): def pipeeither(v): return reduce(lambda a, e: e(a[1]) if a[0] is None else a, l, (None, v)) return pipeeither