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Python Web Scraping

You're reading from Python Web Scraping Successfully scrape data from any website with the power of Python

Product type Paperback

Published in Oct 2015

Publisher Packt

ISBN-13 9781782164364

Length 174 pages

Edition 1st Edition

Languages

Python

Tools

Scrapy

Concepts

Data Mining

Author (1):

Richard Penman

View More author details

Table of Contents (11) Chapters

Preface

1. Introduction to Web Scraping FREE CHAPTER

2. Scraping the Data

3. Caching Downloads

4. Concurrent Downloading

5. Dynamic Content

6. Interacting with Forms

7. Solving CAPTCHA

8. Scrapy

9. Overview

Index

Chapter 3. Caching Downloads

In the preceding chapter, we learned how to scrape data from crawled web pages and save the results to a spreadsheet. What if we now want to scrape an additional field, such as the flag URL? To scrape additional fields, we would need to download the entire website again. This is not a significant obstacle for our small example website. However, other websites can have millions of web pages that would take weeks to recrawl. The solution presented in this chapter is to cache all the crawled web pages so that they only need to be downloaded once.

The rest of the chapter is locked

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Authors (1)

Richard Penman

Richard Penman

Richard Lawson is from Australia and studied Computer Science at the University of Melbourne. Since graduating, he built a business specializing in web scraping while travelling the world, working remotely from over 50 countries. He is a fluent Esperanto speaker, conversational in Mandarin and Korean, and active in contributing to and translating open source software. He is currently undertaking postgraduate studies at Oxford University and in his spare time enjoys developing autonomous drones.

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