list crawlers

Compress python crawlers to generate exe files, 1. Download and decompress pyinstaller (you can download the latest version from the official website ):Https://github.com/pyinstaller/pyinstaller/ 2. Download and install pywin32 (note that my version is python2.7 ):Https://pypi.python.org/pypi/pywin32 3. Put the project file under the pyinstaller folder (my name is baidu. py ): 4. Press shift and right-click, open the command prompt line in the c

Simple Python crawling taobao image crawlers, I wrote a crawler for capturing taobao images, all of which were written using if, for, and while, which is relatively simple and the entry-level work. Http://mm.taobao.com/json/request_top_list.htm from web? Type = 0 page = extract the taobao model photo. Copy codeThe Code is as follows:#-*-Coding: cp936 -*-Import urllib2Import urllibMmurl = "http://mm.taobao.com/json/request_top_list.htm? Type = 0 page

Json=response.body (); SYSTEM.OUT.PRINTLN (JSON); }Catch(IOException e) {//TODO auto-generated catch blockE.printstacktrace (); } }///////////////////////////////////////////////////////////////////////////////////////// //Scenario 2: By developing the capture tool, we know that the form should be submitted in an HTTP post where the Get method is inappropriate /** * Request an English conversation page, crawl results * @param URL * @return * * Private StaticStringProcess

Python crawlers use cookies to simulate login instances. Cookie refers to the data (usually encrypted) stored on the user's local terminal by some websites to identify users and track sessions ). For example, some websites need to log on to the website to obtain the information you want. If you do not log on to the website, you can use the Urllib2 library to save the previously logged-on cookies, load the cookie to get the desired page and then captur

Python crawlers crawl kuaishou videos for multi-thread download, and python kuaishou Environment: python 2.7 + win10 Tool: fiddler postman Android Simulator First, open fiddler, and fiddler is used as an http/https packet capture artifact, which is not described here. Allow https Configure to allow remote connection, that is, enable http Proxy Computer ip Address: 192.168.1.110 Then make sure that the mobile phone and the computer are in a LAN and c

Python crawlers crawl the image address instance code on a webpage, The example in this article is to crawl an image address on a webpage, as shown below. Read the source code of a web page: Import urllib. requestdef getHtml (url): html = urllib. request. urlopen (url). read () return htmlprint (getHtml (http://image.baidu.com/search/flip? Tn = baiduimage ie = UTF-8 word = % E5 % A3 % 81% E7 % BA % B8 ct = 201326592 lm =-1 v = flip )) Use a r

feature library, Then compare the verification code with the feature library. This is more complicated, a blog post is not finished, here will not start, specific practices please make a study of the relevant textbooks.-3. In fact some of the verification code is still very weak, here is not named, anyway, I have 2 of the method to extract the very high accuracy of the verification code, so 2 is actually feasible.-6. SummaryBasically I have encountered all the situation, with the above methods

ASCII characters (alphanumeric and partial symbols), and other characters (such as Chinese characters) are not compliant with the URL standard.Therefore, the use of other characters in the URL requires URL encoding.The part of the URL that passes the parameter (query String), in the format:If you have a "" or "=" symbol in your name or value, there is a problem. Therefore, the parameter string in the URL also needs to encode "=" symbols.URL encoding is the way to convert the characters that nee

Python allows crawlers to download beautiful pictures, The post crawled this time is Baidu's beauty. It gives some encouragement to the masses of male compatriots. Before crawling, You need to log on to the Baidu post Bar account in the browser. You can also use post in the code to submit or add cookies. Crawling address: http://tieba.baidu.com? Kw = % E7 % BE % 8E % E5 % A5 % B3 ie = UTF-8 pn = 0 #-*-Coding: UTF-8-*-import urllib2import reimport re

Using python to make beautiful image Crawlers, The delayed loading technology is used for the loading of petal images. The source code can only download more than 20 images. After modification, the source code can basically download all the images, but the speed is a little slow and will be optimized later. import urllib, urllib2, re, sys, os,requestspath=r"C:\wqa\beautify"url = 'http://huaban.com/favorite/beauty'#http://huaban.com/explore/zhongwenlog

= Course.replace ('',"')7Course = Course.replace ('(',"')8 returnCourseIn this way, the website of other courses in the school can also be deducted from the name of the course (language is not good, please forgive me)1 get_course ('Http://www.massey.ac.nz/massey/learning/programme-course/programme.cfm?prog _id=93059')2'Master of Counselling Studies ('This is very embarrassing, because the second replace function, pattern is wrong, it seems to be changed with a regular1 defget_course (URL):2

(Bytes.read ()) in binary, #write并不是直接将数据写入文件, but write to the memory-specific buffer F.flush (), #将缓冲区的数据立即写入缓冲区, and empty the buffer F.close (); #关闭文件 count+=1; Code Analysis:1.re.findall syntax: FindAll (parttern,string,flags=0)Meaning: Returns all strings in a string that match Partten, and returns the form array2.find () Syntax: Find (Str,pos_start,pos_end)Meaning: In the URL to find the location of the STR string, Pos_start refers to the location from which to start, the default value i

1 #-*-coding:utf-8-*-2 __author__="Carry"3 ImportUrllib4 ImportUrllib25 fromBs4ImportBeautifulSoup6 7 8URL ='http://www.dbmeinv.com/?pager_offset=1'9x = 1Ten defCrawl (URL): Oneheaders = {'user-agent':'mozilla/5.0 (Windows NT 6.1; WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/50.0.2661.102 safari/537.36'} Areq = Urllib2. Request (url,headers=headers) -page = Urllib2.urlopen (req,timeout=20) -Contents =Page.read () the #Print (Contents.decode (' Utf-8 ')) -Soup = beautifulsoup (conten

(Options,function(resp) {varImgdata = ""; Resp.setencoding ("Binary"); Resp.on (' Data ',function(chunk) {Imgdata+=Chunk; }); Resp.on (' End ',function() {Fs.writefile ("./imgs/" +pagenumber+ ". jpg", imgdata, "binary",function(err) {if(Err) {Console.log ("File download failed."); } console.log ("Download Succeeded"); }); }); }); //Timeout ProcessingReq.settimeout (5000,function() {req.abort (); }); //Error HandlingReq.on (' Error ',function(err) {if(err.code== "Econn

First, IntroductionXPath is a language that looks for information in an XML document. XPath can be used to traverse elements and attributes in an XML document. XPath is the main element of the XSLT standard, and both XQuery and XPointer are built on top of the XPath expression.ReferenceSecond, installationPIP3 Install lxml　Third, the use　　1. ImportFrom lxml import etree2. Basic useFrom lxml Import etreewb_data = "" " From the results below, our printer HTML is actually a Python object, et

pattern, pil contrast chromatic aberration, calculated position, Selenium leveling acceleration + leveling deceleration simulation human drag and verifyB. Weibo mobile version: Selenium outbound verification Code pattern, make image template, Selenium outbound verification code pattern, using PIL will compare with image template chromatic aberration, match successfully follow the numerical order in the template name using selenium to drag and verifyC. Access coding platform, selenium outbound v

navigate to the last tag block of the HTML file. After double-click to see the formatted JS code, we can find that the information we want are all inside. The following excerpt:You can see these two linesYundata.fileinfo structure as follows, you can copy and paste it into the json.cn, you can see more clearly.Knowing the position of these three parameters, we can use regular expressions to extract them. The code is as follows:Crawling to these three parameters, you can call the previous transf

This brings us 4 mind map, combing the Python crawler Core Knowledge Points: Network basics, Requests,beautifulsoup,urllib and scrapy crawler framework.Crawler is a very interesting topic, this article is through the crawler completed the task of the primitive accumulation of data required. The first time I caught the data, I felt the world was bright.Of course, because the daily project requirements are not high, the mind map of this article only involves the most basic part of the crawler, but

that the server successfully received a partial request, requiring the client to continue submitting the remaining requests to complete the process. 200~299: Indicates that the server successfully received the request and completed the entire processing process. Common (OK request successful). 300~399: To complete the request, the customer needs to refine the request further. For example: The requested resource has been moved to a new address, common 302 (the requested page has been tem

issue arose: The match was http%3a%2f% 2fxx.jpg Such an address, the problem is obvious, when using Urllib to get HTML, ': ' and '/' were transcoded. The use of the transcoded address to download the image is of course not feasible, you need to transcode the address back to UTF8 encoding. Here are my changes to the gethtml (URL): def gethtml (URL): page =urllib.urlopen (URL) HTML =page.read () HTML =re.sub ( ' %3a " , : " , HTML) HTML =re.sub ( %2f " , " / ,html ' ret