Book Image

Hands-On Natural Language Processing with PyTorch 1.x

By : Thomas Dop
Book Image

Hands-On Natural Language Processing with PyTorch 1.x

By: Thomas Dop

Overview of this book

In the internet age, where an increasing volume of text data is generated daily from social media and other platforms, being able to make sense of that data is a crucial skill. With this book, you’ll learn how to extract valuable insights from text by building deep learning models for natural language processing (NLP) tasks. Starting by understanding how to install PyTorch and using CUDA to accelerate the processing speed, you’ll explore how the NLP architecture works with the help of practical examples. This PyTorch NLP book will guide you through core concepts such as word embeddings, CBOW, and tokenization in PyTorch. You’ll then learn techniques for processing textual data and see how deep learning can be used for NLP tasks. The book demonstrates how to implement deep learning and neural network architectures to build models that will allow you to classify and translate text and perform sentiment analysis. Finally, you’ll learn how to build advanced NLP models, such as conversational chatbots. By the end of this book, you’ll not only have understood the different NLP problems that can be solved using deep learning with PyTorch, but also be able to build models to solve them.
Table of Contents (14 chapters)
1
Section 1: Essentials of PyTorch 1.x for NLP
7
Section 3: Real-World NLP Applications Using PyTorch 1.x

Exploring n-grams

In our CBOW model, we successfully showed that the meaning of the words is related to the context of the words around it. It is not only our context words that influence the meaning of words in a sentence, but the order of those words as well. Consider the following sentences:

The cat sat on the dog

The dog sat on the cat

If you were to transform these two sentences into a bag-of-words representation, we would see that they are identical. However, by reading the sentences, we know they have completely different meanings (in fact, they are the complete opposite!). This clearly demonstrates that the meaning of a sentence is not just the words it contains, but the order in which they occur. One simple way of attempting to capture the order of words within a sentence is by using n-grams.

If we perform a count on our sentences, but instead of counting individual words, we now count the distinct two-word pairings that occur within the sentences, this is known...