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

The theory of attention within neural networks

In the previous chapter, in our sequence-to-sequence model for sentence translation (with no attention implemented), we used both encoders and decoders. The encoder obtained a hidden state from the input sentence, which was a representation of our sentence. The decoder then used this hidden state to perform the translation steps. A basic graphical illustration of this is as follows:

Figure 8.1 – Graphical representation of sequence-to-sequence models

However, decoding over the entirety of the hidden state is not necessarily the most efficient way of using this task. This is because the hidden state represents the entirety of the input sentence; however, in some tasks (such as predicting the next word in a sentence), we do not need to consider the entirety of the input sentence, just the parts that are relevant to the prediction we are trying to make. We can show that by using attention within our sequence...