Turn your R code into packages that others can easily download and use. This practical book shows you how to bundle reusable R functions, sample data, and documentation together by applying author Hadley Wickham’s package development philosophy. In the process, you’ll work with devtools, roxygen, and testthat, a set of R packages that automate common development tasks. Devtools encapsulates best practices that Hadley has learned from years of working with this programming language. Ideal for developers, data scientists, and programmers with various backgrounds, this book starts you with the basics and shows you how to improve your package writing over time. You’ll learn to focus on what you want your package to do, rather than think about package structure. Learn about the most useful components of an R package, including vignettes and unit tests Automate anything you can, taking advantage of the years of development experience embodied in devtools Get tips on good style, such as organizing functions into files Streamline your development process with devtools Learn the best way to submit your package to the Comprehensive R Archive Network (CRAN) Learn from a well-respected member of the R community who created 30 R packages, including ggplot2, dplyr, and tidyr

Python Packages introduces Python packaging at an introductory and practical level that’s suitable for those with no previous packaging experience. Despite this, the text builds up to advanced topics such as automated testing, creating documentation, versioning and updating a package, and implementing continuous integration and deployment. Covering the entire Python packaging life cycle, this essential guide takes readers from package creation all the way to effective maintenance and updating. Python Packages focuses on the use of current and best-practice packaging tools and services like poetry, cookiecutter, pytest, sphinx, GitHub, and GitHub Actions. Features: The book’s source code is available online as a GitHub repository where it is collaborated on, automatically tested, and built in real time as changes are made; demonstrating the use of good reproducible and clear project workflows. Covers not just the process of creating a package, but also how to document it, test it, publish it to the Python Package Index (PyPI), and how to properly version and update it. All concepts in the book are demonstrated using examples. Readers can follow along, creating their own Python packages using the reproducible code provided in the text. Focuses on a modern approach to Python packaging with emphasis on automating and streamlining the packaging process using new and emerging tools such as poetry and GitHub Actions.

A Chicago Public Library Best of the Best Children's Book of 2021 A Kirkus Best Picture Book of 2021 From author Richard Ho and illustrator Jessica Lanan, the heartwarming story of a package that gets lost, then found, and an in-depth behind-the-scenes look at what happens at the post office. Like other packages, this one began as an empty box. It was packed with great care, sealed tight, and given a personal touch. Like other packages, it left the post office with hope. But unlike most packages, before it got to its destination... it got lost. Follow one package that loses its way and discover a friendship tale that proves distance can't always keep us apart.

'Fitzek's thrillers are breathtaking, full of wild twists' HARLAN COBEN Emma's the one that got away. The only survivor of a killer known in the tabloids as 'the hairdresser' – because of the trophies he takes from his victims. Or she thinks she was. The police aren't convinced. Nor is her husband. She never even saw her tormentor properly, but now she recognises him in every man. Questioning her sanity, she gives up her job as a doctor in the local hospital and retreats from the world. It is better to stay at home. Quiet. Anonymous. Safe. No one can hurt her here. And all she did was take a parcel for a neighbour. She has no idea what she's let into her home. 'Sebastian Fitzek is without question one of the crime world's most evocative storytellers. He always serves up an intense, impossible to put down thriller and The Package is no exception. A gripping read with a surprising twist, this one is not to be missed' KARIN SLAUGHTER 'Sebastian Fitzek is simply amazing. I truly hope that one day I will be able to create suspense and plot twists in the way only Sebastian can. A true Master of his craft' CHRIS CARTER Sebastian Fitzek is Germany's most successful author. His books have sold 13 million copies, been translated into more than thirty-six languages and are the basis for international cinema and theatre adaptations. Sebastian Fitzek was the first German author to be awarded the European Prize for Criminal Literature. He lives with his family in Berlin. Coming soon: PASSENGER 23

“An incisive history” of how a bicycle messenger service in Seattle became a global behemoth, and the labor battles along the way (Dissent). We may see their trademark brown trucks everywhere today, but few people know the behind-the-scenes story of United Parcel Service and how it became one of America’s most admired companies. This book reveals how UPS managed to displace General Motors—the very symbol of American capitalism—to become the largest private-sector unionized employer in the United States; its long, tumultuous history with the International Brotherhood of Teamsters; and its effects on its workers and surrounding communities. It also explores the question of its future in the age of Amazon—as it battles to hold on to the throne of the Package King. “Get a copy of Allen’s book for yourself and then pass it on to a UPS driver the next time you get a delivery. She is part of the most organized section of what is possibly the most important industry in 21st-century capitalism, and the outcome of her story will have a lot to do with what our world looks like on the other side of this pandemic.” —Indypendent

A comprehensive reference volume, this book provides readers with a thoughtful packaging primer that covers the challenges of designing packaging for a competitive market in a very hardworking and relevant way.

Why do Jews win so many Nobel Prizes and Pulitzer Prizes? Why are Mormons running the business and finance sectors? Why do the children of even impoverished and poorly educated Chinese immigrants excel so remarkably at school? It may be taboo to say it, but some cultural groups starkly outperform others. The bestselling husband and wife team Amy Chua, author of Battle Hymn of the Tiger Mother, and Jed Rubenfeld, author of The Interpretation of Murder, reveal the three essential components of success – its hidden spurs, inner dynamics and its potentially damaging costs – showing how, ultimately, when properly understood and harnessed, the Triple Package can put anyone on their chosen path to success.