python-day4装饰器、生成器、迭代器

@生成器generator

a=(i*2 for i in range(10))
a.__next__()#等同于next(a)，基本都不用，多用for循环
a.send(m)#将m传为yield的值

@生成器实例（IO异步的雏形）

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

def producer(name):
    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("alex")

@