import gevent from urllib.request import urlopen # 爬虫 def f(url):     print('GET: %s' % url)     resp = urlopen(url)     data = resp.read()     with open('baidu.html', 'wb') as f:         f.write(data)     print('%d bytes %s' % (len(data), url)) # f('http://www.xiaohuar.com/') f('http://www.baidu.com/') # gevent.joinall([ # #     gevent.spawn(f, 'https://www.python.org/'), #     gevent.spawn(f, 'https://www.yahoo.com/'), # # ])