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Learning Data Mining with Python

Learning Data Mining with Python - Second Edition

By : Robert Layton
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Learning Data Mining with Python

Learning Data Mining with Python

By: Robert Layton

Overview of this book

This book teaches you to design and develop data mining applications using a variety of datasets, starting with basic classification and affinity analysis. This book covers a large number of libraries available in Python, including the Jupyter Notebook, pandas, scikit-learn, and NLTK. You will gain hands on experience with complex data types including text, images, and graphs. You will also discover object detection using Deep Neural Networks, which is one of the big, difficult areas of machine learning right now. With restructured examples and code samples updated for the latest edition of Python, each chapter of this book introduces you to new algorithms and techniques. By the end of the book, you will have great insights into using Python for data mining and understanding of the algorithms as well as implementations.
Table of Contents (14 chapters)
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Creating the dataset


In this chapter, to spice up things a little, let us take on the role of the bad guy. We want to create a program that can beat CAPTCHAs, allowing our comment spam program to advertise on someone's website. It should be noted that our CAPTCHAs will be a little easier than those used on the web today and that spamming isn't a very nice thing to do.

Note

We play the bad guy today, but please don't use this against real world sites. One reason to "play the bad guy" is to help improve the security of our website, by looking for issues with it.

Our experiment will simplify a CAPTCHA to be individual English words of four letters only, as shown in the following image:

Our goal will be to create a program that can recover the word from images like this. To do this, we will use four steps:

  1. Break the image into individual letters.
  2. Classify each individual letter.
  3. Recombine the letters to form a word.
  4. Rank words with a dictionary to try to fix errors.

Note

Our CAPTCHA-busting algorithm...

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Learning Data Mining with Python
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