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

Theory of sequence-to-sequence models

Sequence-to-sequence models are very similar to the conventional neural network structures we have seen so far. The main difference is that for a model's output, we expect another sequence, rather than a binary or multi-class prediction. This is particularly useful in tasks such as translation, where we may wish to convert a whole sentence into another language.

In the following example, we can see that our English-to-Spanish translation maps word to word:

Figure 7.1 – English to Spanish translation

Figure 7.1 – English to Spanish translation

The first word in our input sentence maps nicely to the first word in our output sentence. If this were the case for all languages, we could simply pass each word in our sentence one by one through our trained model to get an output sentence, and there would be no need for any sequence-to-sequence modeling, as shown here:

Figure 7.2 – English-to-Spanish translation of words

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