Merging iterators (coroutine)

merge_two.py

def merge_two(i: Iterator[T], j: Iterator[T]) -> Iterator[T]:
    """
    >>> list(merge_two(iter([1, 2, 4]), iter([0, 1, 3, 4])))
    [0, 1, 1, 2, 3, 4, 4]
    """
    try:
        x = next(i)
    except StopIteration:
        yield from j
        return
    try:
        y = next(j)
    except StopIteration:
        yield x
        yield from i
        return

    while True:
        if y > x:
            yield x
            try:
                x = next(i)
            except StopIteration:
                yield y
                yield from j
                return
        else:
            yield y
            try:
                y = next(j)
            except StopIteration:
                yield x
                yield from i
                return