Book Image

Python Reinforcement Learning

By : Sudharsan Ravichandiran, Sean Saito, Rajalingappaa Shanmugamani, Yang Wenzhuo
Book Image

Python Reinforcement Learning

By: Sudharsan Ravichandiran, Sean Saito, Rajalingappaa Shanmugamani, Yang Wenzhuo

Overview of this book

Reinforcement Learning (RL) is the trending and most promising branch of artificial intelligence. This Learning Path will help you master not only the basic reinforcement learning algorithms but also the advanced deep reinforcement learning algorithms. The Learning Path starts with an introduction to RL followed by OpenAI Gym, and TensorFlow. You will then explore various RL algorithms, such as Markov Decision Process, Monte Carlo methods, and dynamic programming, including value and policy iteration. You'll also work on various datasets including image, text, and video. This example-rich guide will introduce you to deep RL algorithms, such as Dueling DQN, DRQN, A3C, PPO, and TRPO. You will gain experience in several domains, including gaming, image processing, and physical simulations. You'll explore TensorFlow and OpenAI Gym to implement algorithms that also predict stock prices, generate natural language, and even build other neural networks. You will also learn about imagination-augmented agents, learning from human preference, DQfD, HER, and many of the recent advancements in RL. By the end of the Learning Path, you will have all the knowledge and experience needed to implement RL and deep RL in your projects, and you enter the world of artificial intelligence to solve various real-life problems. This Learning Path includes content from the following Packt products: • Hands-On Reinforcement Learning with Python by Sudharsan Ravichandiran • Python Reinforcement Learning Projects by Sean Saito, Yang Wenzhuo, and Rajalingappaa Shanmugamani
Table of Contents (27 chapters)
Title Page
About Packt
Contributors
Preface
Index

Deep Q-learning


Here comes the fun part—the brain design of our AI Atari player. The core algorithm is based on deep reinforcement learning or deep RL. In order to understand it better, some basic mathematical formulations are required. Deep RL is a perfect combination of deep learning and traditional reinforcement learning. Without understanding the basic concepts about reinforcement learning, it is difficult to apply deep RL correctly in real applications, for example, it is possible that someone may try to use deep RL without defining state space, reward, and transition properly.

Well, don't be afraid of the difficulty of the formulations. We only need high school-level mathematics, and will not go deep into the mathematical proofs of why traditional reinforcement learning algorithms work. The goal of this chapter is to learn the basic Q-learning algorithm, to know how to extend it into the deep Q-learning algorithm (DQN), and to understand the intuition behind these algorithms. Besides...