python crawler tutorial

information ' text/html; Charset=utf8 '>>> r.encoding # Encoded information ' Utf-8 '>>> r.text #内容部分 (R.content can also be used if there is a coding problem)U ' A variety of different HTTP requests>>> r = requests.post ("Http://httpbin.org/post")>>> r = requests.put ("Http://httpbin.org/put")>>> r = Requests.delete ("Http://httpbin.org/delete")>>> r = Requests.head ("Http://httpbin.org/get")>>> r = requests.options ("Http://httpbin.org/get")Request with parameters >>> payload = {' WD ': ' Zh

. What's easy to worry about is the comment section of the documentFrom BS4 import BeautifulSoup, CDataMarkup = "Soup = beautifulsoup (markup)Comment = soup.b.stringPrint (type (comment))# Comment object is a special type of navigablestring object:Print (comment)#美化后的输出结果Print (Soup.b.prettify ())# Other types defined in Beautiful soup may appear in the XML document:# CData, ProcessingInstruction, Declaration, Doctype. Similar to the Comment object,# These classes are all navigablestring subclas

This article mainly describes how to use Python multi-thread crawler to crawl movie heaven resources. if you need it, you can refer to it and spend some time learning Python, I also wrote a multi-threaded crawler program to get the thunder of movie heaven resources. the code has been uploaded to GitHub and can be downl

The first time I touched a reptile this thing was in May this year, when I wrote a blog search engine. The crawler used is also very intelligent, at least more than the film to the station used by the crawler level is much higher!Back to the topic of writing crawlers in Python.Python has always been my primary scripting language, not one of them.Python's language is simple and flexible, and the standard lib

where the spider code is placed. Ii. Clear Objectives (myspider/items.py)We intend to crawl: "http://www.cnblogs.com/miqi1992/default.html?page=2" site blog address, title, creation time, text. Open the items.py in the Cnblogspider directory Item defines a structured data field that is used to hold the crawled data, somewhat like the dict in Python, but provides some additional protection from errors. You can define an item by c

This article mainly describes the Python web crawler function of the basic wording, web crawler, the Web spider, is a very image of the name. The internet analogy to a spider web, then spider is crawling on the Internet spiders, the network crawler interested friends can refer to this article The web

Python crawling framework Scrapy crawler entry: Page extraction, pythonscrapy Preface Scrapy is a very good crawling framework. It not only provides some basic components available in the out-of-the-box environment, but also provides powerful Customization Based on your own needs. This article describes how to extract the Scrapy page of the Python capture framewo

Python supports multithreading, mainly through the thread and threading modules. This article mainly shares with you how to implement multi-threaded web crawler in python. For more information, see, there are two ways to use a Thread. One is to create a function to be executed by the Thread, and pass the function into the Thread object for execution. the other is

This article is not an introductory post and requires some knowledge of the Python and crawler fields.Crawler is another area, involving more knowledge points, not only to be familiar with web development, and sometimes involved in machine learning and other knowledge, but in Python everything becomes simple, there are many third-party libraries to help us achiev

Overview The project is based on the scrapy framework of the Python News crawler, able to crawl NetEase, Sohu, Phoenix and surging website News, will title, content, comments, time and other content to organize and save to local detailed code download: http://www.demodashi.com/demo/ 13933.html. Development backgroundPython, as a hooping in data processing, has been growing in recent years. Web

Python crawler entry (4)-Verification Code Part 1 (mainly about verification code verification process, excluding Verification Code cracking), python part 1 This article describes the verification process of the verification code, including how to implement the verification code, how to obtain the verification code, how to identify the verification code (this art

Powerful crawlers based on Node. js can directly publish captured articles. Java Web crawler provides App data (Jsoup web crawler) Asynchronous concurrency control in Nodejs crawler advanced tutorial Node. js basic module http and webpage analysis tool cherrio implement crawle