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                        /Python开发简单爬虫

为什么这里全部出错了呢。打印不出来

#coding=utf-8

url = "http://www.daidu.com"

print '第一种方法'
response1 = urllib2.urlopen(url)

print response1.getcode()
print len(response1.read())

print "第二种方法"

request = urllib2.Request(url)
request.add_header("user-agent","Mozilla/5.0")
response2=urllib2.urlopen(request)
print response2.getcode()
print len(response2.read())

print "第三种方法"
cj=cookielib.CookieJar()
opener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
urllib2.install_opener(opener)
response3=urllib2.urlopen(url)
print response3.getcode()
print cj
print response3.read()

这是什么原因？？

weibo_da哒嘀_0

2016-08-19

源自：Python开发简单爬虫 5-3

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UFO2015 回答被采纳 +3 积分
2016-09-12

# coding:utf8 
__author__ = 'xray'
import urllib2
import cookielib

url = "https://rollbar.com/docs/"

print '第一种方法'
response1 = urllib2.urlopen(url)
print response1.getcode()
print len(response1.read())

print '第二种方法'
request = urllib2.Request(url)
request.add_header("user-agent", "Mozilla/5.0")
response2 = urllib2.urlopen(request)
print response2.getcode()
print response2.read()

print '第三种方法'
cj = cookielib.CookiJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
urllib2.install_opener(opener)
response3 = urllib2.urlopen(url)
print response3.getcode()
print cj
print response3.read()