2017 | ISBN: 9781786462589 | English | 215 pages | True PDF | 7,14 MB

Successfully scrape data from any website with the power of Python 3.

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Key Features

A hands-on guide to web scraping using Python with solutions to real-world problems
Create a number of different web scrapers in Python to extract information
This book includes practical examples on using the popular and well-maintained libraries in Python for your web scraping needs

Book Description

The Internet contains the most useful set of data ever assembled, most of which is publicly accessible for free. However, this data is not easily usable. It is embedded within the structure and style of websites and needs to be carefully extracted. Web scraping is becoming increasingly useful as a means to gather and make sense of the wealth of information available online.

This book is the ultimate guide to using the latest features of Python 3.x to scrape data from websites. In the early chapters, you'll see how to extract data from static web pages. You'll learn to use caching with databases and files to save and manage the load on servers. After covering the basics, you'll get hands-on practice building a more sophisticated crawler using browsers, crawlers, and concurrent scrapers.

You'll detee when and how to scrape data from a jаvascript-dependent website using PyQt and Selenium. You'll get a better understanding of how to submit forms on complex websites protected by CAPTCHA. You'll find out how to automate these actions with Python packages such as mechanize. You'll also learn how to create class-based scrapers with Scrapy libraries and implement your learning on real websites.

By the end of the book, you will have explored testing websites with scrapers, remote scraping, best practices, working with images, and many other relevant topics.
What you will learn

Extract data from web pages with simple Python programming
Build a concurrent crawler to process web pages in parallel
Follow links to crawl a website
Extract features from the HTML
Cache ed HTML for reuse
Compare concurrent models to detee the fastest crawler
Find out how to parse jаvascript-dependent websites
Interact with forms and sessions



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