Book Image

Mastering PyTorch

By : Ashish Ranjan Jha
Book Image

Mastering PyTorch

By: Ashish Ranjan Jha

Overview of this book

Deep learning is driving the AI revolution, and PyTorch is making it easier than ever before for anyone to build deep learning applications. This PyTorch book will help you uncover expert techniques to get the most out of your data and build complex neural network models. The book starts with a quick overview of PyTorch and explores using convolutional neural network (CNN) architectures for image classification. You'll then work with recurrent neural network (RNN) architectures and transformers for sentiment analysis. As you advance, you'll apply deep learning across different domains, such as music, text, and image generation using generative models and explore the world of generative adversarial networks (GANs). You'll not only build and train your own deep reinforcement learning models in PyTorch but also deploy PyTorch models to production using expert tips and techniques. Finally, you'll get to grips with training large models efficiently in a distributed manner, searching neural architectures effectively with AutoML, and rapidly prototyping models using PyTorch and fast.ai. By the end of this PyTorch book, you'll be able to perform complex deep learning tasks using PyTorch to build smart artificial intelligence models.
Table of Contents (20 chapters)
1
Section 1: PyTorch Overview
4
Section 2: Working with Advanced Neural Network Architectures
8
Section 3: Generative Models and Deep Reinforcement Learning
13
Section 4: PyTorch in Production Systems

Training RNNs for sentiment analysis

In this section, we will train an RNN model using PyTorch for a text classification task – sentiment analysis. In this task, the model takes in a piece of text – a sequence of words – as input and outputs either 1 (meaning positive sentiment) or 0 (negative sentiment). For this binary classification task involving sequential data, we will use a unidirectional single-layer RNN.

Before training the model, we will manually process the textual data and convert it into a usable numeric form. Upon training the model, we will test it on some sample texts. We will demonstrate the use of various PyTorch functionalities to efficiently perform this task. The code for this exercise can be found at https://github.com/PacktPublishing/Mastering-PyTorch/blob/master/Chapter04/rnn.ipynb.

Loading and preprocessing the text dataset

For this exercise, we will need to import a few dependencies:

  1. First, execute the following import...