yield实现异步

def cash_out(amount):
    while amount >0:
        amount-=1
        yield 1
        print('get again %s' %amount)
atm=cash_out(5)
print(type(atm))
print(atm.next())
print(234234)
print(atm.next())

import time
def consumer(name):
    print("%s 准备吃包子啦!" %name)
    while 1:
        baozi = yield
        print("包子[%s]来了，被[%s]吃了!" %(baozi, name))

def producer():
    c = consumer('A')
    c2 = consumer('B')
    c.next()
    c2.next()
    print("老子开始准备做包子啦!")
    for i in range(10):
        time.sleep(1)
        print("做了2个包子!")
        c.send(i)
        c2.send(i)
producer()