Python 使用生成器实现协程

#-*- coding:utf8 -*-
def consumer():
    r = ''
    while True:
     n = yield r
     if not n:
         return
     print('[CONSUMER]Consuming %s...' % n)
     r = '200 OK'
 
def producer(c):
    # 启动生成器
    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()
 
if __name__ == '__main__':
    c = consumer()
    producer(c)