#-*- coding:utf-8 -

import urllib.request

from http import cookiejar

url = "https://www.baidu.com/"

print('-------1111----------')

response1 = urllib.request.urlopen(url)

print(response1.getcode())

print (len(response1.read()))

print (response1.read())

print('--------22222-----------')

request1 =urllib.request.Request(url)

request1.add_header("user-agent", "Mozilla/5.0")

response2 = urllib.request.urlopen(request1)

print(response2.getcode())

print (len(response2.read()))

print (response1.read())

print('---------333333333----------')

cj = cookiejar.CookieJar()

opener = urllib.request.build_opener( urllib.request.HTTPCookieProcessor(cj))

urllib.request.install_opener(opener)

response3 = urllib.request.urlopen(url)

print (response3.getcode())

print ('len:'+str(len(response3.read())))

print (response3.read())

#print (cj)

控制台输出结果为：

-------1111----------

200

227

b''

--------22222-----------

200

227

b''

---------333333333----------

200

len:227

b''