Python协程的使用

import time

#使用装饰器测试协程的运行时间
def func(fun):
    def wapper(*args,**kwargs):
        start=time.time()
        fun(*args,**kwargs)
        end=time.time()
        print(end-start)
    return wapper


#生产者消费者模式
def consumer():
    r = ‘‘
    while True:
        n = yield r
        if not n:
            return
        print(‘[CONSUMER] Consuming %s...‘ % n)
        r = ‘200 OK‘

@func
def produce(c):
    c.send(None)
    n = 0
    while n < 5:
        n = n + 1
        print(‘[PRODUCER] Producing %s...‘ % n)
        r = c.send(n)
        print(‘[PRODUCER] Consumer return: %s‘ % r)
    c.close()

c = consumer()
produce(c)