python proxy checker ,change to threaded version

[elca]

Hello ALL,

i have some python proxy checker .

and to speed up check, i was decided change to mutlthreaded version,

and thread module is first for me, i was tried several times to convert to
thread version
 
and look for many info, but it not so much easy for novice python programmar
.

if anyone can help me really much appreciate!! 

thanks in advance!


    import urllib2, socket
    
    socket.setdefaulttimeout(180)
    # read the list of proxy IPs in proxyList
    proxyList = open('listproxy.txt').read()
    
    def is_bad_proxy(pip):    
        try:        
            proxy_handler = urllib2.ProxyHandler({'http': pip})        
            opener = urllib2.build_opener(proxy_handler)
            opener.addheaders = [('User-agent', 'Mozilla/5.0')]
            urllib2.install_opener(opener)        
            req=urllib2.Request('http://www.yahoo.com')  # <---check whether
proxy alive 
            sock=urllib2.urlopen(req)
        except urllib2.HTTPError, e:        
            print 'Error code: ', e.code
            return e.code
        except Exception, detail:
    
            print "ERROR:", detail
            return 1
        return 0
    
    
    for item in proxyList:
        if is_bad_proxy(item):
            print "Bad Proxy", item
        else:
            print item, "is working"
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