I had no idea how hard it could be to write a book with such a tight deadline among so many other things taking place in my life. I had to fit the writing into my routine, taking care of my family, karate lessons, work, Diablo III, and so on. The task was not easy; however, I got to the end of it hoping that I have generated quality content to please most readers, considering that I have focused on the most important thing based on my experience.

The list of people I would like to acknowledge is so long that I would need a book only for this. So, I would like to thank some people I have constant contact with and who, in a direct or indirect way, helped me throughout this quest.

My wife Anicieli Valeska de Miranda Pertile, the woman I chose to share my love with and gather toothbrushes with to the end of this life, who allowed me to have the time to create this book and did not let me give up when I thought I could not make it. My family has always been important to me during my growth as a human being and taught me the path of goodness.

I would like to thank Fanthiane Ketrin Wentz, who beyond being my best friend is also guiding me through the ways of martial arts, teaching me the values I will carry during a lifetime—a role model for me. Lis Marie Martini, dear friend who provided the cover for this book, and who is an incredible photographer and animal lover.

Big thanks to my former English teacher, reviser, and proofreader, Marina Melo, who helped along the writing of this book. Thanks to the reviewers and personal friends, Vitor Mazzi and Bruno Torres, who contributed a lot to my professional growth and still do.

Special thanks to Rodrigo Cacilhas, Bruno Bemfica, Rodrigo Delduca, Luiz Shigunov, Bruno Almeida Santos, Paulo Tesch (corujito), Luciano Palma, Felipe Cruz, and other people with whom I often talk to about technology. A special thanks to Turma B.

Big thanks to Guido Van Rossum for creating Python, which transformed programming into something pleasant; we need more of this stuff and less set/get.