一个简单的协程案例：

# 时间，健康（身体健康，精神愉快），玛瑙def eater(name):    print("name:%s,start to eat"%name)    food_list=[]    while True:        food=yield food_list        print("%s eat %s"%(name,food))        food_list.append(food)    print("done")e=eater("alex")print(next(e))print(e.send("包子"))print(e.send("鲍鱼仔"))print(e.send("蚝生仔"))## def hello(name):#     print("name:%s"%name)#     yield hello### h=hello("alex")# next(h)