# recvcount.py
#
# Example of a co-routine

def recv_count():
    try:
        while True:
            n = (yield)
            print "T-minus", n
    except GeneratorExit:
        print "Kaboom!"

r = recv_count()
r.next()
for i in range(5,0,-1):
    r.send(i)

r.close()