import urllib2
content = urllib2.urlopen('http://XXXX').read()

import urllib2
proxy_support = urllib2.ProxyHandler({'http':'http://XX.XX.XX.XX:XXXX'})
opener = urllib2.build_opener(proxy_support, urllib2.HTTPHandler)
urllib2.install_opener(opener)
content = urllib2.urlopen('http://XXXX').read()

import urllib2, cookielib
cookie_support= urllib2.HTTPCookieProcessor(cookielib.CookieJar())
opener = urllib2.build_opener(cookie_support, urllib2.HTTPHandler)
urllib2.install_opener(opener)
content = urllib2.urlopen('http://XXXX').read()

opener = urllib2.build_opener(proxy_support, cookie_support, urllib2.HTTPHandler)

import urllib
postdata=urllib.urlencode({
'username':'XXXXX',
'password':'XXXXX',
'continueURI':'http://www.verycd.com/',
'fk':fk,
'login_submit':'登录'
})

req = urllib2.Request(
url = 'http://secure.verycd.com/signin/*/http://www.verycd.com/',
data = postdata
)
result = urllib2.urlopen(req).read()

#…
headers = {
'User-Agent':'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6'
}
req = urllib2.Request(
url = 'http://secure.verycd.com/signin/*/http://www.verycd.com/',
data = postdata,
headers = headers
)
#...

#...
headers = {
'Referer':'http://www.cnbeta.com/articles'
}
#...

print time.time()-start
1..
from threading import Thread
from Queue import Queue
from time import sleep
import urllib2
import time
q = Queue()
NUM = 10
JOBS = 50
def do_somthing_using(p):
response = urllib2.urlopen('http://www.cnblogs.com')
result = response.read()
#print p
def working():
while True:
arguments = q.get()
do_somthing_using(arguments)
q.task_done()
for i in xrange(NUM):
t = Thread(target=working)
t.setDaemon(True)
t.start()
start = time.time()
for i in xrange(JOBS):
q.put(i)
q.join()
print "MultiThreading:"
print time.time()-start
2..
from threading import Thread
from multiprocessing.dummy import Pool as ThreadPool
import urllib2
import time
start = time.time()
url = "http://www.cnblogs.com"
urls = [url] * 50
pool = ThreadPool(4)
results = pool.map(urllib2.urlopen, urls)
pool.close()
pool.join()
print "Map:"
print time.time()-start