Book Image

Mastering spaCy

By : Duygu Altınok
Book Image

Mastering spaCy

By: Duygu Altınok

Overview of this book

spaCy is an industrial-grade, efficient NLP Python library. It offers various pre-trained models and ready-to-use features. Mastering spaCy provides you with end-to-end coverage of spaCy's features and real-world applications. You'll begin by installing spaCy and downloading models, before progressing to spaCy's features and prototyping real-world NLP apps. Next, you'll get familiar with visualizing with spaCy's popular visualizer displaCy. The book also equips you with practical illustrations for pattern matching and helps you advance into the world of semantics with word vectors. Statistical information extraction methods are also explained in detail. Later, you'll cover an interactive business case study that shows you how to combine all spaCy features for creating a real-world NLP pipeline. You'll implement ML models such as sentiment analysis, intent recognition, and context resolution. The book further focuses on classification with popular frameworks such as TensorFlow's Keras API together with spaCy. You'll cover popular topics, including intent classification and sentiment analysis, and use them on popular datasets and interpret the classification results. By the end of this book, you'll be able to confidently use spaCy, including its linguistic features, word vectors, and classifiers, to create your own NLP apps.
Table of Contents (15 chapters)
1
Section 1: Getting Started with spaCy
4
Section 2: spaCy Features
9
Section 3: Machine Learning with spaCy

Chapter 6: Putting Everything Together: Semantic Parsing with spaCy

This is a purely hands-on section. In this chapter, we will apply what we have learned hitherto to Airline Travel Information System (ATIS), a well-known airplane ticket reservation system dataset. First of all, we will get to know our dataset and make the basic statistics. As the first natural language understanding (NLU) task, we will extract the named entities with two different methods, with spaCy Matcher, and by walking on the dependency tree.

The next task is to determine the intent of the user utterance. We will explore intent recognition in different ways, too: by extracting the verbs and their direct objects, by using wordlists, and by walking on the dependency tree to recognize multiple intents. Then you will match your keywords to synonyms from a synonyms list to detect semantic similarity.

Also, you'll do keyword matching with word vector-based semantic similarity methods. Finally, we will combine...