cj = http.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(cj)
print(len(response3.read()))

import?urllib.request
from?http?import?cookiejar
url='https://www.baidu.com/'
print('第一種方法')
response1=urllib.request.urlopen(url)
print(response1.getcode())
print(len(response1.read()))


print('第二種方法')
request?=?urllib.request.Request(url)
request.add_header('user-agent',"Mozilla/5.0")
response2=urllib.request.urlopen(request)
print(response2.getcode())
print(len(response2.read()))


print('第三種方法')

cookie=cookiejar.CookieJar()
cj=cookie
opener=urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))
urllib.request.install_opener(opener)
response3=urllib.request.urlopen(request)
print(response3.getcode())
print(cj)
print(response3.read())