python web crawler code

1. Install Beautiful Souphttp://www.crummy.com/software/BeautifulSoup/bs4/download/4.4/After extracting, go to the root directoryOperating under the console:Python setup.py InstallOperation Result:Processing dependencies for beautifulsoup4==4.4.0Finished processing dependencies for beautifulsoup4==4.4.0Then, continue to run under the console:Pip Install Beautifulsoup4Create a new test filetest_soup.py from Import BeautifulSoupOperating under the console:Python test_soup.pyIf no error occurs, the

' : open ( ' Report.xls ' ' RB ' )}>>> r = requestspost (urlfiles =files) >>> r. Text{ "files": { "file": "}, /span> you can also explicitly set the file name:>>>Url=' Http://httpbin.org/post '>>>Files={ ' file ' : ( ' Report.xls ' open ( ' Report.xls ' ' RB ' >>> r = requestspost (urlfiles =files) >>> r. Text{ "files": { "file": "}, /span> If you want, you can also send a string as a file to receive :>>>Url=' Http://httpbin.org/post

1 #Coding:utf-82 ImportUrllib23 ImportRe4 ImportThreading5 6 #image Download7 defloadimg (addr,x,y,artname):8data =urllib2.urlopen (addr). Read ()9f = open (Artname.decode ("Utf-8") +str (y) +'. jpg','WB')Ten f.write (data) One f.close () A - #specific Post page resolution, get the image link address, and use loadimg download artname for the post name - defGetimglink (html,x,artname): theRelink =' " alt= ". *.jpg"/>' -Cinfo =Re.findall (relink,html) -y =0 - forLininchCinfo: +IMGADDR ='

Today using requests and BeautifulSoup climbed some pictures, or very fulfilling, comments may be wrong, I hope you have more commentsImportRequests fromBs4Importbeautifulsoupcircle= Requests.get ('Http://travel.quanjing.com/tag/12975/%E9%A9%AC%E5%B0%94%E4%BB%A3%E5%A4%AB')#put the acquired picture address into count in turnCount = []#put the acquired page content into BeautifulSoupSoup = BeautifulSoup (Circle.text,'lxml')#According to Google Selectgadget this plugin, get HTML tags, such as get:

Python's first Web Crawler Recently I want to get started with Python. The method for getting started with a language is to write a Demo. Python Demo must be a crawler. The first small crawler is a little simple, so do not spray i

1 Creating a ProjectScrapy Startproject Tutorial2 Defining the itemImport ScrapyClass Dmozitem (Scrapy. Item):title = Scrapy. Field ()link = scrapy. Field ()desc = scrapy. Field ()After the Paser data is saved to the item list, it is passed to pipeline using3 Write the first crawler (spider), saved in the Tutorial/spiders directory dmoz_spider.py, the crawler to be based on the file name to start.Import Scr

Label:This procedure involves the following aspects of knowledge: 1.python links MySQL Database: http://www.cnblogs.com/miranda-tang/p/5523431.html 2. crawl Chinese website and various garbled processing : http://www.cnblogs.com/miranda-tang/p/5566358.html 3.BeautifulSoup Use 4. the original Web page data information is not all in a dictionary, the non-existent field is set to empty Detailed

,i,path): If not os.path.exists (path):Os.makedirs (PATH)File_path = path +'/' +STR (i) +'. txt 'f =Open (File_path,' W ') For itemIn items: if __name__ = =' __main__ ':item_new= item.Replace‘\ n‘,‘‘).Replace' ‘\ n‘).Replace' ‘‘).Replace' ‘‘).Replace' ‘\ n‘).Replace' ‘\ n‘)F.write (item_new)F.close () def run (Self): Print Span style= "color: #000080; Font-weight:bold ">for i in range ( Span style= "COLOR: #0000ff" >1,35): content= self.get _page (i) items= self.analysis (content) Self.save

Python crawler scrapy framework-manual recognition, logon, inverted text verification code, and digital English Verification Code, Currently, zhihu uses the verification code of the inverted text in the click graph: 　 You need to click the inverted text in the figure to log

) Requests.get (URL, params=none, **kwargs)? URL: URL link to get page? Additional parameters in Params:url, dictionary or byte stream format, optional? **kwargs:12 Parameters for control access(3) Properties of the Response object:R.status_code The return status of the HTTP request, 200 indicates a successful connection, and 404 indicates a failureR.text A string form of the HTTP response content, that is, the page content of the URLR.encoding How the response content is encoded from the HTTP h

Description: Download pictures, regular expressions for tests onlyTest URL for Iron Man post An introduction to Mark's armor postsThe following code will download all the pictures of the first page to the root directory of the program#!/usr/bin/env python#!-*-coding:utf-8-*-ImportUrllib,urllib2ImportRe#返回网页源代码 def gethtml(URL):html = urllib2.urlopen (URL) srccode = Html.read ()returnSrccode def getimg(srcco

Python-written web crawler (very simple)This is one of my classmates passed to me a small web crawler, feel very interesting, and share with you. However, there is a point to note, to use python2.3, if the use of python3.4 will be some problems arise.The

(to_list,subject,content):Me= "Hello" + "msg = Mimetext (content,_subtype= ' plain ', _charset= ' utf-8 ')msg[' Subject '] = SubjectMsg[' from '] = MeMsg[' to '] = ";". Join (To_list)TryServer = Smtplib. SMTP ()Server.connect (Mail_host)Server.login (MAIL_USER,MAIL_PWD)Server.sendmail (Me, To_list, msg.as_string ())Server.close ()Return TrueExcept Exception as E:Print (str (e))Return Falsedef tag (Url,key):I=1While 1:Tryr = Requests.get (URL)Cont =r._content.decode (' Utf-8 ')Except Exception a

Since python2.x and python3.x are very different, python2.x calls urllib with instruction Urllib.urlopen (),Run times wrong: Attributeerror:module ' urllib ' has no attribute ' Urlopen 'The reason is that urllib.request should be used in python3.x.After the download page is successful, call the Webbrowsser module and enter the instruction Webbrowsser. Open_new_tab (' baidu.com.html ')TrueOpen (' baidu.com.html ', ' W '). Write (HTML)Writes the downloaded Web