Expert Twisted

Explore Twisted, the Python-based event-driven networking engine, and review several of its most popular application projects. It is written by community leaders who have contributed to many of the projects covered, and share their hard-won insights and experience. Expert Twisted starts with an introduction to event-driven programming, explaining it in the context of what makes Twisted unique. It shows how Twisted's design emphasizes testability as a solution to common challenges of reliability, debugging, and start-to-finish causality that are inherent in event-driven programming. It also explains asynchronous programming, and the importance of functions, deferreds, and coroutines. It then uses two popular applications, treq and klein, to demonstrate calling and writing Web APIs with Twisted. The second part of the book dives into Twisted projects, in each case explaining how the project fits into the Twisted ecosystem and what it does, and offers several examples to bring readers up to speed, with pointers to additional resources for more depth. Examples include using Twisted with Docker, as a WSGI container, for file sharing, and more. What You'll LearnIntegrate Twisted and asyncio using adapters Automate software build, test, and release processes with Buildbot Create clients and servers with Autobahn Transfer files with Magic Wormhole Distribute cloud-based file storage with Tahoe LAFSUnderstand HTTP/2 with Python and Twisted Support for asynchronous tasks using Django Channels Who This Book Is For Readers should have some Python experience and understand the essentials of containers and protocols, but need not be familiar with Twisted or the associated projects covered in the book.

Explore Twisted, the Python-based event-driven networking engine, and review several of its most popular application projects. It is written by community leaders who have contributed to many of the projects covered, and share their hard-won insights and experience. Expert Twisted starts with an introduction to event-driven programming, explaining it in the context of what makes Twisted unique. It shows how Twisted's design emphasizes testability as a solution to common challenges of reliability, debugging, and start-to-finish causality that are inherent in event-driven programming. It also explains asynchronous programming, and the importance of functions, deferreds, and coroutines. It then uses two popular applications, treq and klein, to demonstrate calling and writing Web APIs with Twisted. The second part of the book dives into Twisted projects, in each case explaining how the project fits into the Twisted ecosystem and what it does, and offers several examples to bring readers up to speed, with pointers to additional resources for more depth. Examples include using Twisted with Docker, as a WSGI container, for file sharing, and more.

Explore and apply best practices for efficient application deployment. This book draws upon author Moshe Zadka's years of Dev Ops experience and focuses on the parts of Python, and the Python ecosystem, that are relevant for DevOps engineers. You'll start by writing command-line scripts and automating simple DevOps-style tasks. You'll then move on to more advanced cases, like using Jupyter as an auditable remote-control panel, and writing Ansible and Salt extensions. This work also covers how to use the AWS API to manage cloud infrastructure, and how to manage Python programs and environments on remote machines. Python was invented as a systems management language for distributed operating systems, which makes it an ideal tool for DevOps. ​Assuming a basic understanding of Python concepts, this book is perfect for engineers who want to move from operations/system administration into coding. What You'll LearnUse third party packages and create new packages Create operating system management and automation code in Python Write testable code, and testing best practices Work with REST APIs for web clients Who This Book Is For Junior or intermediate sysadmin who has picked up some bash and Python basics.

The true-story of life and love in an unfamiliar world. When Naginder Sehmi was born in Kenya nobody could have predicted the amazing life he was to live. From the scorched plains of Africa to the lofty mountains of Switzerland, Narender’s lifelong journey has been filled with unbelievable moments. In Twisted Turban, Naginder not only describes his continent-crossing journey in vivid detail but he also provides an unparalleled insight into the life as a Sikh. With heart-wrenching honesty, the stories show the struggle for love in a caste-based society and the inevitable approach of death and decay. Naginder also provides a commentary on the modern problems faced by Sikhs, both spiritually and in everyday life, and provides his own solutions to dealing with them. Beautifully-written with a fiery sense of humour that brings this distant world to life, Twisted Turban is a revealing insight into the life of a Sikh.

Gale's 26th birthday turns into a living nightmare when she and her friends decide to spend the night in an abandoned mansion. As the eerie house begins to close in around them, Gale's paranoia grows, fueled by the unsettling feeling that someone, or something, is watching their every move. Haunted by a traumatic event from ten years ago, Gale is forced to confront her darkest fears when a figure from her past resurfaces. As the lines between reality and illusion blur, she must unravel the twisted web of deceit to survive. Will Gale uncover the truth before it's too late? Find out in this heart-pounding psychological thriller that will keep you guessing until the shocking finale.

Peter Benton arrives in Buenos Aires, Argentina in June 1945 to investigate possible fraud in the local office of a foreign film distributor. In Buenos Aires, he reunites with his partner from his days in the OSS, who has been posted to the U.S. embassy. His friend recruits him to spy on the most powerful figure in Argentina, Colonel Juan Pern, and his young mistress, Eva Duarte. Complicating the assignment is the simultaneous arrival of a former Germany army officer who is on a secret mission to deliver gold to Pern that will help pave the way for the re-birth of the Third Reich. Benton soon finds himself caught up in a dangerous game of high-stakes diplomacy, political intrigure, deceit, and betrayal, a game that not only puts his own life in danger but one that threatens the life of the young Argentine beauty with whom he falls in love. This story of suspense and romance is told against the realistic backdrop of a major turning point in the history of Argentina and its relations with the United States.

A licensed psychologist who stars on the cable breakout show I Need a Push, Reagan Bishop helps participants become their best selves by urging them to overcome obstacles and change behaviors. An overachiever, Reagan is used to delivering results. Despite her overwhelming professional success, Reagan never seems to earn her family’s respect. Her younger sister, Geri, is and always will be the Bishop family favorite. When a national network buys Reagan’s show, the pressure for unreasonably quick results and higher ratings mounts. Desperate to make the show work and keep her family at bay, Reagan actually listens when the show’s New Age healer offers an unconventional solution.... Record Nielsen ratings follow. But when Reagan decides to use her newfound power to teach everyone a lesson about sibling rivalry, she’s the one who will be schooled....

Retired Phoenix Police Sergeant Darren Burch captivates you on another wild police ride-along with outrageously macabre and compelling stories from his thirty-year career as a rookie cop, sex crime detective, and night detective sergeant in the Phoenix Police Department’s Homicide Unit in this gut-clinching, horrific, and oftentimes laugh-out-loud funny follow-up to Darren’s award-winning true-crime book, Twisted But True. Darren’s dark humor reemerges with a vengeance, starting with death and despair, and then to the hilarious as a rookie cop in “That First Squad,” to a case of animal sexual depravity in “Choking the Chicken,” and a deadly home invasion beyond belief in “That One Case”, which was featured on the ID Channel’s American Detective TV series. These thirty true-crime stories mirror the time frame of Twisted But True, but this time, Darren goes even deeper and darker by filling in the cracks.