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Python Web Scraping

You're reading from Python Web Scraping Hands-on data scraping and crawling using PyQT, Selnium, HTML and Python

Product type Paperback

Published in May 2017

Publisher

ISBN-13 9781786462589

Length 220 pages

Edition 2nd Edition

Languages

HTML

Tools

PyQt

Concepts

Data Mining

Author (1):

Katharine Jarmul

View More author details

Table of Contents (10) 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. Putting It All Together

BMW

To investigate how to reverse engineer a new website, we will take a look at the BMW site. The BMW website has a search tool to find local dealerships, available at https://www.bmw.de/de/home.html?entryType=dlo:

This tool takes a location and then displays the points near it on a map, such as this search for Berlin:

Using browser developer tools such as the Network tab, we find that the search triggers this AJAX request:

https://c2b-services.bmw.com/c2b-localsearch/services/api/v3/ 
    clients/BMWDIGITAL_DLO/DE/ 
        pois?country=DE&category=BM&maxResults=99&language=en& 
            lat=52.507537768880056&lng=13.425269635701511

Here, the maxResults parameter is set to 99. However, we can increase this to download all locations in a single query, a technique covered in Chapter 1, Introduction to Web Scraping. Here is the result when maxResults is increased to 1000:

>>> import...

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Authors (1)

Jarmul

Jarmul

Katharine Jarmul is a data scientist and Pythonista based in Berlin, Germany. She runs a data science consulting company, Kjamistan, that provides services such as data extraction, acquisition, and modelling for small and large companies. She has been writing Python since 2008 and scraping the web with Python since 2010, and has worked at both small and large start-ups who use web scraping for data analysis and machine learning. When she's not scraping the web, you can follow her thoughts and activities via Twitter (@kjam)

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