This book is the outcome of a long journey that goes beyond the mere content preparation. Many people have contributed in different ways to shape the final result. Firstly, I would like to thank the team at Packt Publishing, particularly Sonali Vernekar and Siddhesh Salvi, for giving me the opportunity to work on this book and for being so helpful throughout the whole process. I would also like to thank Dr. Weiai “Wayne” Xu for reviewing the content of this book and suggesting many improvements. Many colleagues and friends, through casual conversations, deep discussions, and previous projects, strengthened the quality of the material presented in this book. Special mentions go to Dr. Miguel Martinez-Alvarez, Marco Campana, and Stefano Campana. I'm also happy to be part of the PyData London community, a group of smart people who regularly meet to talk about Python and data science, offering a stimulating environment. Last but not least, a distinct special mention goes to Daniela, who has encouraged me during the whole journey, sharing her thoughts, suggesting improvements, and providing a relaxing environment to go back to after work.