Count runs of extra spaces?

spaced.py

from functools import partial, wraps


def coroutine(func):
    # Based on http://www.dabeaz.com/coroutines/coroutine.py
    @wraps(func)
    def start(*args,**kwargs):
        cr = func(*args,**kwargs)
        cr.next()
        return cr
    return start


@coroutine
def reps():
    """ comment preserved by @wraps in coroutine. """
    seq = ''
    while True:
        c = (yield)
        if c is None:
            lst = seq
            seq = ''
            yield lst
        else:
            seq += c
            yield ''


def chk(c, gaps):
    if c == ' ':
        rsp = gaps.send(c)
        gaps.next()
    else:
        rsp = gaps.send(None)
        gaps.next()
    return len(rsp)


if __name__ == '__main__':
    s = 'hello  there to  everyone in the    world' # extra spaces!
    chkr = partial(chk, gaps=reps())
    print sum(v for v in map(chkr, s) if v >= 2)