python多线程形成并发URL请求

import urllib2
import threading
def run():
    url="http://schedule-1-e:8080/aciton=sumbit"
    import urllib
    param=urllib.urllencode({})
    print url
    req=urllib2.Request(url)
    res=urllib2.urlopen(req,data=param)
    print res.read()
    
if __name__=='__main__':
    for i in range(10):
        t=threading.Thread(target=run,name="thread-"+str(i)))
        t.start()
        t.join()