سير العمل البرمجي · التناوب بين المكررات المنتهية

from collections import deque
def interleave(groups):
    active = deque(map(iter, groups))
    while active:
        current = active.popleft()
        try: value = next(current)
        except StopIteration: continue
        yield value
        active.append(current)