xls opener

Brief introduction:URLLIB2 is a Python module that obtains a URL (Uniform Resource locators, a unified resource addressable device). It provides a very concise interface in the form of a urlopen function. This makes it possible to obtain URLs with a variety of protocols. It also provides a slightly more complex interface to handle common situations-such as basic authentication, cookies, proxies, and so on. These are handled by objects called opener an

://www.example.com/') req.add_header (' Referer ', ' http://www.python.org/') #http是无状态的协议, The last request from the client is not related to the next client-to-server request, and most omit this step R = Urllib2.urlopen (req)Openerdirector automatically adds a user-agent header for each request, So the second method is as follows (Urllib2.buildopener will return a Openerdirector object, about the Urllib2.buildopener Class):Import Urllib2opener = Urllib2.build_opener () opener.addheaders = [('

Python crawler Cookie usage, pythoncookie 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 before they can access a page. Before you log on, it is not allowed to capture the content of a page. Then we can use the Urllib2 library to save the cookies we log on to, and then capture other pages to achieve our goal. Before that, I would like to introduce the concept of an

% E7 % 86% 8A % E7 % 8C % AB "for I in range (1,481 ): a = urllib2.Request (url1 + str (I) + url3) B = urllib2.urlopen (a) path = str ("D:/noval/Skyeye Uploader" + str (I) + ". html ") c = open (path," w + ") code = B. read () c. write (code) c. close print "current number of downloaded pages:", I In fact, the above Code uses urlopen to achieve the same effect: Import urllib2 url1 = "http://bbs.tianya.cn/post-16-835537-" url3 = ". shtml # ty_vip_look [% E6 % 8B % 89% E9 % A3 % 8E % E7 % 86% 8

holds the user name and password to be processed passwdmgr = urllib2. Httppasswordmgrwithdefaultrealm () # 2. Add account information, the first parameter realm is the domain information related to the remote server, generally no one cares that it is write none, the following three parameters are Proxy server, username, password Passwdmgr.add_password (None, ProxyServer, User, passwd) # 3. Build a proxy base user name/password Authentication Proxybasicauthhandler Processor Object , the parame

Before you start, explain the two methods in Urllib2: Info/geturlUrlopen returns an Answer object response (or Httperror instance) has two very useful methods info () and Geturl () 1.geturl (): This returns the real URL obtained, which is useful because the Urlopen (or the opener object) may be redirected. The URL you get may be different from the request URL.As an example of a super link in everyone,Let's build a urllib2_test10.py to compare the or

Analog Grep-rl "python" F:\xuyaping this command#查看xuyaping文件夹所有的绝对路径import Osg=os.walk ("f:\\xuyaping") #g为迭代器for i in G: # Print (i) #i为文件路径 for J in I[-1]: file_path= "%s\\%s"% (i[0],j) print (File_path)Program Output Result:F:\xuyaping\xuyaping.txt.txtf:\xuyaping\xuyaping1.txt.txtf:\xuyaping\a\a.txt.txtf:\xuyaping\a\a1\a1.txt.txtf:\ Xuyaping\a\a1\a2\a2.txt.txtf:\xuyaping\b\b.txt.txtThe code is as follows:#模拟grep-rl "python" F:\xuyaping this command import os,time# init

Two important concepts in urllib2: Openers, Handlers, and urllib2openers Before starting the following content, let's first explain the two methods in urllib2: info/geturlThe response object response (or HTTPError instance) returned by urlopen has two useful methods: info () and geturl () 1. geturl (): This returns the obtained real URL, which is useful because urlopen (or used by the opener object) may be redirected. The obtained URL may be different

This article first introduces two methods of urllib2, and then introduces in detail the two important concepts of urllib2: Openers and Handlers. we hope to help you before you start the following content, the following two methods in urllib2 are described: info/geturl. The response object response (or HTTPError instance) returned by urlopen has two useful methods: info () and geturl () 1. geturl (): This returns the obtained real URL, which is useful because urlopen (or used by the

displaying the homepage content. The following is an example in this document. We will transform this example to implement the functions we want. Import cookielib, urllib2cj = cookielib. cookieJar () opener = urllib2.build _ opener (urllib2.HTTPCookieProcessor (cj) r = opener. open ("http://example.com/") # coding: utf-8import urllib2, urllibimport cookieliburl

' Error code: ', E.code except Urlerror, E: print ' We failed to reach a server. ' print ' Reason: ', E.reason else: # everything is fine Note: Except Httperror must be in the first, otherwise except Urlerror will likewise receive to Httperror. The second one: From URLLIB2 import Request, Urlopen, urlerror req = Request (Someurl) Try: response = Urlopen (req) except Urlerror, E: if Hasattr (E, ' reason '): print ' We failed to reach a server. ' print ' Reason

= url + '? '+ Dataresponse = urllib2.urlopen (url2) the_page = response. read () print the_page The following example describes how to use cookies by simulating logon to Renren and then displaying the homepage content. The following is an example in this document. we will transform this example to implement the functions we want. Import cookielib, urllib2cj = cookielib. cookieJar () opener = urllib2.build _ ope