1 #！/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 import gevent 4 from gevent import monkey;monkey.patch_all() 5 import requests 6  7 def f(url): 8     print('GET:%s'% url) 9     res = requests.get(url)10     data= res.text11     print(url,len(data))12 13 gevent.joinall(14     [gevent.spawn(f,'http://www.baidu.com'),15      gevent.spawn(f, 'http://www.qq.com'),16     gevent.spawn(f,'http://www.58.com'),17     gevent.spawn(f,'http://www.python.org'),18      ]19 )20 21 '''22 def foo():23     print('run foo.....')24     gevent.sleep(2)25     print('switch to foo.....')26 27 def bar():28     print('run bar.....')29     gevent.sleep(3)30     print('switch to bar.....')31 32 gevent.joinall([33     gevent.spawn(foo),34     gevent.spawn(bar)])35 '''

 生产者消费者模型

#！/usr/bin/env python# -*- coding:utf-8 -*-def consumer():    last = ''    while True:        receival = yield last        if receival is not None:            print('Consume %s' % receival)            last = receivaldef producer(gen, n):    gen.__next__()    x = 0    while x < n:        x += 1        print('Produce %s' % x)        last = gen.send(x)    gen.close()gen = consumer()producer(gen, 5)

 消费者consumer()函数是一个生成器函数，每次执行到yield时即挂起，并返回上一次的结果给生产者。生产者producer()接收到生成器的返回，并生成一个新的值，通过send()方法发送给消费者。