python web crawler code

Python Web crawler Introduction:Sometimes we need to copy the picture of a webpage. Usually the manual way is the right mouse button save picture as ...Python web crawler can copy all the pictures at once.The steps are as follows:

, its ID is 6731, enter this ID value, the program will automatically download Lei album songs and their corresponding lyrics downloaded to the local, run as follows:After the program has finished running, the lyrics and songs are down to local, such as:Then you can hear the elegant songs locally, such as "Chengdu", see:We want to listen to the song as long as you run this bot, enter the ID of the singer you like, wait a moment, you can hear the song you want to ~~~10 song is no matter, as long

Finally have the time to do with the Python knowledge learned to write a simple web crawler, this example is mainly implemented with Python crawler from the Baidu Gallery to download beautiful pictures, and saved in the local, gossip less, directly posted the corresponding

(Self.dfile, ' W ') as FP:For i in Xrange (Len (self.alivelist)):Fp.write (Self.alivelist[i])def linkwithproxy (self,line):Linelist=line.split (' \ t ')Protocol=linelist[2].lower ()Server=protocol+r '://' +linelist[0]+ ': ' +linelist[1]Opener=urllib2.build_opener (URLLIB2. Proxyhandler ({protocol:server}))Urllib2.install_opener (opener)TryResponse=urllib2.urlopen (self. Url,timeout=self.timeout)ExceptPrint ('%s connect failed '%server)ReturnElseTryStr=response.read ()ExceptPrint ('%s connect fa

reproduced from: http://blog.csdn.net/pleasecallmewhy/article/details/19642329 (Suggest everyone to read more about the official website tutorial: Tutorial address) We use the dmoz.org site as a small grab to catch a show of skill. First you have to answer a question. Q: Put the Web site into a reptile, a total of several steps. The answer is simple, step four: New Project (Project): Create a new reptile project clear goal (items): Define the targe

[Python] web crawler (vi): A simple Baidu bar paste of the small reptile #-*-Coding:utf-8-*-#---------------------------------------# program: Baidu paste Stick Crawler # version: 0.1 # Author: Why # Date: 2013-05-1 4 # language: Python 2.7 # Action: Enter the address with

= Urllib.request.urlopen (URL) html = Response.read (). Decode (' utf-8 ') pattern = Re.compile (' (2), for the second case, the next request can be made at random intervals of several seconds after each request. Some Web sites with logical vulnerabilities can be requested several times, log off, log on again, and continue with the request to bypass the same account for a short period of time without limiting the same request. [Comments: For th

Today try to use Python to write a web crawler code, mainly want to visit a website, select the information of interest, and save the information in a certain format in the early Excel.This code mainly uses the following Python fe

' }) req = Urllib2. Request ( url = ' Http://secure.verycd.com/signin ', data = PostData ) result = Urllib2.urlopen (req ) Print Result.read () 10. Disguised as browser accessSome websites resent the crawler's visit, so the crawler refuses to requestThis time we need to disguise as a browser, which can be done by modifying the header in the HTTP packet # ... headers = { ' user-agent ': ' mozilla/5.0 (Windows; U Windows NT 6.1;

Through this API, you can directly obtain a tested extraction script, which is a standard XSLT program. you only need to run it on the DOM of the target webpage to obtain the results in XML format, get API instructions for all fields at a time-download the gsExtractor content extraction tool 1. Interface name Download Content Extraction Tool 2. Interface Description If you want to write a web crawler progr

Python provides examples of Netease web crawler functions that can obtain all text information on Netease pages. This example describes how to use Python to obtain all text information on the Netease page. We will share this with you for your reference. The details are as follows: # Coding = UTF-8 # -------------------

Overview: This is a simple crawler, and its function is also very simple: Given a url, crawling the page of the url, then extracting the url addresses that meet the requirements, put these addresses in the queue, after the given web page is captured, the URL in the queue is used as a parameter, and the program crawls the data on this page again. It stops until it reaches a certain depth (specified by the pa

://10.106.0.217:8080/opac_two/reader/infoList.jsp ', data = postdata) #访问该链接 # #result = Opener.open (req) result = Urllib2.urlopen (req) #打印返回的内容 #print result.read (). Decode (' GBK '). Encode (' Utf-8 ') #打印cookie的值for item in Cookie:print ' cookie:name = ' +item.name priNT ' Cookie:value = ' +item.valueresult = Opener.open (' http://10.106.0.217:8080/opac_two/top/top.jsp ') print U ""------ ------------------------------------------------------------------------"" "MyPage = Result.read () my

The python language has been increasingly liked and used by program stakeholders in recent years, as it is not only easy to learn and master, but also has a wealth of third-party libraries and appropriate management tools; from the command line script to the GUI program, from B/S to C, from graphic technology to scientific computing, Software development to automated testing, from cloud computing to virtualization, all these areas have

The difficulties encountered:1. python3.6 installation, it is necessary to remove the previous completely clean, the default installation directory is: C:\Users\ song \appdata\local\programs\python2. Configuration variables There are two Python versions in the PATH environment variable, environment variables: add C:\Users\ song \appdata\local\programs\python\python36-32 in PathThen PIP configuration: Path i

Function Introduction: Use Selenium and Chrome browser, let it automatically open Baidu page, and set to show 50 per page, and then in Baidu Search box input selenium, to query. Then open the page and select "Selenium-Open source China community" and open the page Knowledge Brief: The role of Selenium: 1. Originally used for Web site automation testing, in recent years, to obtain accurate site snapshots. 2). Can be run directly on the browser, let the

[Code] Python crawler practice: crawling the whole site novel ranking, All those who like to read novels know that there are always some novels that are refreshing. no matter whether they are Xianxia or xuanhuan, after dozens of chapters, they have successfully circled a large number of fans and successfully climbed the list, the following are some examples of

location locally, that is, part of the resource at that pointDelete request deletes the resource stored in the URL locationUnderstand the difference between patch and putSuppose the URL location has a set of data userinfo, including the Userid,username and so on 20 fields.Requirements: The user modified the username, the other unchanged.With patches, only local update requests for username are submitted to the URL.With put, all 20 fields must be submitted to the URL, and uncommitted fields are

This article mainly introduces the example of using a python web crawler to collect Lenovo words. For more information, see python crawlers. The code is as follows: # Coding: UTF-8Import urllib2Import urllibImport reImport timeFrom random import choice# Note: the proxy ip

Newmenulistener ());Savemenuitem.addactionlistener (New Savemenulistener ());Filemenu.add (Newmenuitem);Filemenu.add (Savemenuitem);Filemenu.add (Filemenu);Menubar.add (Filemenu);Frame.setjmenubar (MenuBar);Frame.getcontentpane (). Add (Broderlayout,mainpanel);Frame.setsize (200,200);Frame.setvisible (TRUE);}public class Nextcardlistener implements actionlistener{public void actionperformed (ActionListener ev) {Quizcard card=new Quizcard (Question.gettext (), Answer.gettext ());Cardlist.add (ca