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 fast.ai to set up model training in a few minutes

In this section, we will use the fast.ai library (https://docs.fast.ai/) to train and evaluate a handwritten digit classification model in fewer than 10 lines of code, in the form of an exercise. We will also use fast.ai's interpretability module to understand where the trained model is still failing to perform well. The full code for the exercise can be found at the following GitHub page: https://github.com/PacktPublishing/Mastering-PyTorch/blob/master/Chapter14/fast.ai.ipynb.

Setting up fast.ai and loading data

In this section, we will first import the fast.ai library, load the MNIST dataset, and finally preprocess the dataset for model training. We'll proceed as follows:

  1. First, we will import fast.ai in the recommended way, as shown here:
    import os
    from fast.ai.vision.all import *

    Although import * is not the recommended way of importing libraries in Python, the fast.ai documentation suggests this format...