Class S

Lib/test/test_itertools.py:2194–2201

Test immediate stop

        return v

class S:
    'Test immediate stop'
    def __init__(self, seqn):
        pass
    def __iter__(self):
        return self
    def __next__(self):
        raise StopIteration

def L(seqn):
    'Test multiple tiers of iterators'