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

Using a pre-trained GPT-2 model as a text generator

Using the transformers library together with PyTorch, we can load most of the latest advanced transformer models for performing various tasks such as language modeling, text classification, machine translation, and so on. We demonstrated how to do so in Chapter 5, Hybrid Advanced Models.

In this section, we will load the pre-trained GPT-2-based language model. We will then extend this model so that we can use it as a text generator. Then, we will explore the various strategies we can follow to generate text from a pre-trained language model and use PyTorch to demonstrate those strategies.

Out-of-the-box text generation with GPT-2

In the form of an exercise, we will load a pre-trained GPT-2 language model using the transformers library and extend this language model as a text generation model to generate arbitrary yet meaningful texts. We will only show the important parts of the code for demonstration purposes. In order to...