【Python】urllib多线程请求效率

import urllib,threading,datetime
m = 3
class Worker(threading.Thread):
def run(self):
kwargs = self._Thread__kwargs
url = kwargs["url"]
s = urllib.urlopen(url)
print "\n"+str(datetime.datetime.now())+"\n"
works = [Worker(kwargs={"url": "https://baidu.com"}) for i in range(m)]
for i in range(m):
works[i].start()