def eater():
    print(‘start to eat‘)
    while True:
        food=yield
        print(‘is eating food:%s‘%food)

def producer():
    dog=eater()
    next(dog) # 先next一次唤醒协程函数
    #然后下面的操作都是dog.send（值）
    food1=‘北京烤鸭‘
    food2=‘鱼香肉丝‘
    dog.send(food1)
    dog.send(food2)
producer()

输出结果：
start to eat
is eating food:北京烤鸭
is eating food:鱼香肉丝