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Mastering spaCy

Mastering spaCy

By : Duygu Altınok
4.4 (16)
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Mastering spaCy

Mastering spaCy

4.4 (16)
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)
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1
Section 1: Getting Started with spaCy
4
Section 2: spaCy Features
9
Section 3: Machine Learning with spaCy

Understanding lemmatization

A lemma is the base form of a token. You can think of a lemma as the form in which the token appears in a dictionary. For instance, the lemma of eating is eat; the lemma of eats is eat; ate similarly maps to eat. Lemmatization is the process of reducing the word forms to their lemmas. The following code is a quick example of how to do lemmatization with spaCy:

 import spacy
 nlp = spacy.load("en_core_web_md")
 doc = nlp("I went there for working and worked for 3 years.")
 for token in doc:
     print(token.text, token.lemma_)
I -PRON-
went go
there
for for
working work
and and
worked work
for for
3 3
years year
. .

By now, you should be familiar with what the first three lines of the code do. Recall that we import the spacy library, load an English model using spacy.load, create a pipeline, and apply the pipeline to the preceding sentence to get a Doc object. Here we iterated over tokens to get their text and...

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