Book Image

Python Machine Learning Cookbook - Second Edition

By : Giuseppe Ciaburro, Prateek Joshi
Book Image

Python Machine Learning Cookbook - Second Edition

By: Giuseppe Ciaburro, Prateek Joshi

Overview of this book

This eagerly anticipated second edition of the popular Python Machine Learning Cookbook will enable you to adopt a fresh approach to dealing with real-world machine learning and deep learning tasks. With the help of over 100 recipes, you will learn to build powerful machine learning applications using modern libraries from the Python ecosystem. The book will also guide you on how to implement various machine learning algorithms for classification, clustering, and recommendation engines, using a recipe-based approach. With emphasis on practical solutions, dedicated sections in the book will help you to apply supervised and unsupervised learning techniques to real-world problems. Toward the concluding chapters, you will get to grips with recipes that teach you advanced techniques including reinforcement learning, deep neural networks, and automated machine learning. By the end of this book, you will be equipped with the skills you need to apply machine learning techniques and leverage the full capabilities of the Python ecosystem through real-world examples.
Table of Contents (18 chapters)

Converting text to its base form using lemmatization

The goal of lemmatization is also to reduce words to their base forms, but this is a more structured approach. In the previous recipe, you saw that the base words that we obtained using stemmers don't really make sense. For example, the word wolves was reduced to wolv, which is not a real word. Lemmatization solves this problem by doing things with a vocabulary and morphological analysis of words. It removes inflectional word endings, such as -ing or -ed, and returns the base form of a word. This base form is known as the lemma. If you lemmatize the word wolves, you will get wolf as the output. The output depends on whether the token is a verb or a noun.

Getting ready

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