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#!/usr/bin/python
# -*- coding: UTF-8 -*-

import cookielib
import urllib2

url = "http://www.baidu.com"
response1 = urllib2.urlopen(url)
print "First method"
# Get the status code, 200 indicates success
print response1.getcode()
# Get the length of the web page content
print len(response1.read())

print "Second method"
request = urllib2.Request(url)
# Simulate a crawler with the Mozilla browser
request.add_header("user-agent","Mozilla/5.0")
response2 = urllib2.urlopen(request)
print response2.getcode()
print len(response2.read())

print "Third method"
cookie = cookielib.CookieJar()
# Add the ability to handle cookies with urllib2
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookie))
urllib2.install_opener(opener)
response3 = urllib2.urlopen(url)
print response3.getcode()
print len(response3.read())
print cookie

pip install beautifulsoup4

import bs4
print bs4