python获取网页信息的三种方法

import urllib.request
import http.cookiejar

url = \'http://www.baidu.com/\'

# 方法一
print(\'方法一\')
req_one = urllib.request.Request(url)
req_one.add_header(\'User-Agent\', \'Mozilla/6.0\')
res_one = urllib.request.urlopen(req_one)
code_one = res_one.getcode()
html_one = res_one.read().decode(\'utf-8\')
res_one.close()
print(\'方法一网页状态码：%s\' % (code_one))
print(\'方法一网页内容：\'+html_one)


# 方法二
print(\'方法二\')
res_two = urllib.request.urlopen(url)
code_two = res_two.getcode()
html_two = res_two.read().decode(\'utf-8\')
print(\'方法二网页状态码：%s\' % (code_two))
print(\'方法二网页内容：\'+html_two)


#方法三
print(\'方法三\')
cj = http.cookiejar.LWPCookieJar()
opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))
urllib.request.install_opener(opener)
res_three = urllib.request.urlopen(url)
print(cj)
code_three = res_three.getcode()
html_three = res_three.read().decode(\'utf-8\')
res_three.close()
print(\'方法三网页状态码：%s\' % (code_three))
print(\'方法三的网页内容：\'+html_three)