def test_window_sum(self):
res = []
reactivex.from_(range(6)).pipe(
ops.window_with_count(count=3, skip=1),
ops.flat_map(lambda i: i.pipe(ops.sum(), )),
).subscribe(on_next=res.append)
assert res == [3, 6, 9, 12, 9, 5, 0]
def sum_(
key_mapper: Optional[Mapper[Any, float]] = None
) -> Callable[[Observable[Any]], Observable[float]]:
if key_mapper:
return compose(ops.map(key_mapper), ops.sum())
def accumulator(prev: float, cur: float) -> float:
return prev + cur
return ops.reduce(seed=0, accumulator=accumulator)
def create():
return xs.pipe(ops.sum(lambda x: len(x)))
def create():
return xs.pipe(ops.sum())