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

Combining spaCy models and matchers

In this section, we'll go through some recipes that will guide you through the entity extraction types you'll encounter in your NLP career. All the examples are ready-to-use and real-world recipes. Let's start with number-formatted entities.

Extracting IBAN and account numbers

IBAN and account numbers are two important entity types that occur in finance and banking frequently. We'll learn how to parse them out.

An IBAN is an international number format for bank account numbers. It has the format of a two-digit country code followed by numbers. Here are some IBANs from different countries:

Figure 4.6 – IBAN formats from different countries (source: Wikipedia)

Figure 4.6 – IBAN formats from different countries (source: Wikipedia)

How can we create a pattern for an IBAN? Obviously, in all cases, we start with two capital letters, followed by two digits. Then any number of digits can follow. We can express the country code and the next two digits as follows...