python web scraping library

Python Standard library basehttpserver Chinese translation. Note: The basehttpserver module has been merged into Http.serverin Python3, and when you convert your resource to Python3, the 2to3 tool will self-adapt the import. Source code: lib/basehttpserver.pyThis module defines two classes for implementing an HTTP server (WEB servers). Typically, th

JSONLINT: parse the python json data validation library instance, jsonlintjson JSON (JavaScript Object Notation) is a lightweight data exchange format that is easy to read and write. JSON Functions To use the JSON function, you must import the json Library: import json. Function Description Json. dumps Encodes a

One, what is selenium In the process of crawling Baidu Library, we need to use a tool selenium (browser automated test framework), selenium is a tool for Web application testing, it can test directly run in the browser, as we usually use the Internet browser, support IE (7,8, 9,10,11), Firefox,safari,chrome,opera and so on. So, we can use it to crawl the site's data, the data can be crawled with Ajax, you c

There are a number of useful tools classes in the Python standard library, but when used specifically, the standard library documentation does not describe the details of the usage, such as URLLIB2 this HTTP client library. Here's a summary of some of the URLLIB2 's usage details. setting of 1.Proxy2.Timeout settings3

There are many useful tool classes in the Python standard library, but it is not clear how to use the detail description on the standard library document, such as URLLIB2, which is the HTTP client library. Here is a summary of some of the URLLIB2 's usage details. Settings for 1.Proxy2.Timeout settings3. Add a specifi

child in soup. body. children: 3 print (child. name) 4 5 # traverse the child node 6 for child in soup. body. descendants: 7 print (child. name) Uplink traversal of the label tree 1 # When traversing all the advanced nodes, including soup itself, so if... else... judge 2 for parent in soup. a. parents: 3 if parent is None: 4 print (parent) 5 else: 6 print (parent. name) Running result: Div Div Body Html [Document] Parallel traversal of the label tree 1 # traverse subsequent nodes 2 for siblin

Python crawler tutorial-elegant HTTP library requests (2) and pythonrequests Preface Urllib, urllib2, urllib3, httplib, and httplib2 are HTTP-related Python modules. If you look at the Python Module name, you will find it anti-human. What's worse, these modules are very different in Python2 and Python3, if the business

Various scan code softwareRecently to do a two-dimensional code recognition of the project, find two-dimensional code to identify a lot of open source of non-open source softwarehttp://www.oschina.net/project/tag/238/ZbarFirst try to Zbar,python load Zbar when a variety of error. The possible reason is that the Zbar DLL file is 32 bits, and my system is 64 bits, so it can't run. Can only take the source code to compile a 64-bit out, for my hand this p

BeautifulSoup is a third-party library of Python that can be used to help parse content such as html/xml to crawl specific page information. The latest is the V4 version, here is the main summary of the V3 version I used to parse HTML some common methods. Get ready 1.Beautiful Soup Installation In order to be able to parse the content in the page, this article uses beautiful Soup. Of course, the sample req

This article mainly introduces the basic tutorial for using the Python Urllib library. It is a required knowledge for programming crawlers in Python. For more information, see 1. Pull a webpage in minutes How to obtain webpages? In fact, the webpage information is obtained based on the URL. Although we see a beautiful picture in the browser, it is actually prese

': ', ' class ': [' No-login ']} [' No-login ']LoginHere's the note.HTML content traversal of the BS4 libraryThe basic structure of HTMLDownlink traversal of the tag treeWhere the BeautifulSoup type is the root node of the tag tree.1 # Traverse son node 2 for inch Soup.body.children: 3 Print (Child.name) 4 5 # Traverse descendant Nodes 6 for inch soup.body.descendants: 7 Print (Child.name)Upstream traversal of the tag tree1 # Traverse all ancestors nodes, including soup itself, so if.

JSON is typically used for data exchange between Web clients and servers, that is, 字符串类型 converting data into or converting to Python基本数据类型 Python基本数据类型 字符串类型 .Common methods Method Description Json.loads (obj) Serializes a string into Python's basic data type, noting single and double quotation marks

[Translated from original English: Easy Web scraping with Python] I wrote an article more than a year ago "web scraping using node.js". Today I revisit this topic, but this time I'm going to use Python so that the techniques offer

Web Apps also follow the client server architecture The browser is a basic Web client, she implements two basic functions, one is to download the file from the Web server, and the other is to render the file Modules such as Urllib and URLLIB2 (which can open web pages that need to be logged on), with similar fu

A simple example of Python embedding is just written (almost enough for now ~), Next, let's look at the actual things. Without these applications, the previous embedding will be meaningless. When writing other embedded parts later, you don't have to understand all the functions at once, right ~ Okay. Let's see what I think is the most interesting part of the python lib