协程举例

from gevent import monkey;monkey.patch_all()import geventimport requestsimport timedef runtask(url):    print('visit --> %s %s' % (url,time.ctime()))    try:        res = requests.get(url)        time.sleep(2)        data = res.text        print('%d bytes received from %s %s' % (len(data),url,time.ctime()))    except Exception as e :        print(e)if __name__ == '__main__':    urls = ['http://www.baidu.com','http://www.sohu.com','http://www.163.com']    greenlets = [ gevent.spawn(runtask,url) for url in urls]    gevent.joinall(greenlets)

result

协程池

from gevent import monkey;monkey.patch_all()from gevent.pool import Poolimport requestsimport timedef runtask(url):    print('visit --> %s %s' % (url,time.ctime()))    try:        res = requests.get(url)        time.sleep(2)        data = res.text        print('%d bytes received from %s %s' % (len(data),url,time.ctime()))    except Exception as e :        print(e)    return 'url %s --->finshed' % urlif __name__ == '__main__':    pool = Pool(2)    urls = ['http://www.baidu.com','http://www.sohu.com','http://www.163.com']    results = pool.map(runtask,urls)    print(results)