Master GUI programming in Tkinter as you design, implement, and deliver ten real-world applications from start to finish About This Book Conceptualize and build state-of-art GUI applications with Tkinter Tackle the complexity of just about any size GUI application with a structured and scalable approach A project-based, practical guide to get hands-on into Tkinter GUI development Who This Book Is For Software developers, scientists, researchers, engineers, students, or programming hobbyists with basic familiarity in Python will find this book interesting and informative. People familiar with basic programming constructs in other programming language can also catch up with some brief reading on Python. No GUI programming experience is expected. What You Will Learn Get to know the basic concepts of GUI programming, such as Tkinter top-level widgets, geometry management, event handling, using callbacks, custom styling, and dialogs Create apps that can be scaled in size or complexity without breaking down the core Write your own GUI framework for maximum code reuse Build apps using both procedural and OOP styles, understanding the strengths and limitations of both styles Learn to structure and build large GUI applications based on Model-View-Controller (MVC) architecture Build multithreaded and database-driven apps Create apps that leverage resources from the network Learn basics of 2D and 3D animation in GUI applications Develop apps that can persist application data with object serialization and tools such as configparser In Detail Tkinter is the built-in GUI package that comes with standard Python distributions. It is a cross-platform package, which means you build once and deploy everywhere. It is simple to use and intuitive in nature, making it suitable for programmers and non-programmers alike. This book will help you master the art of GUI programming. It delivers the bigger picture of GUI programming by building real-world, productive, and fun applications such as a text editor, drum machine, game of chess, media player, drawing application, chat application, screen saver, port scanner, and many more. In every project, you will build on the skills acquired in the previous project and gain more expertise. You will learn to write multithreaded programs, network programs, database driven programs and more. You will also get to know the modern best practices involved in writing GUI apps. With its rich source of sample code, you can build upon the knowledge gained with this book and use it in your own projects in the discipline of your choice. Style and approach An easy-to-follow guide, full of hands-on examples of real-world GUI programs. The first chapter is a must read as it explains most of the things you need to get started with writing GUI programs with Tkinter. Each subsequent chapter is a stand-alone project that discusses some aspects of GUI programming in detail. These chapters can be read sequentially or randomly depending upon the readers experience with Python.

Build mesmerizing visualizations, analytics, and logs from your data using Elasticsearch, Logstash, and Kibana About This Book Solve all your data analytics problems with the ELK stack Explore the power of Kibana4 search and visualizations built over Elasticsearch queries and learn about the features and plugins of Logstash Develop a complete data pipeline using the ELK stack Who This Book Is For If you are a developer or DevOps engineer interested in building a system that provides amazing insights and business metrics out of data sources, of various formats and types, using the open source technology stack that ELK provides, then this book is for you. Basic knowledge of Unix or any programming language will be helpful to make the most out of this book. What You Will Learn Install, configure, and run Elasticsearch, Logstash, and Kibana Understand the need for log analytics and the current challenges in log analysis Build your own data pipeline using the ELK stack Familiarize yourself with the key features of Logstash and the variety of input, filter, and output plugins it provides Build your own custom Logstash plugin Create actionable insights using charts, histograms, and quick search features in Kibana4 Understand the role of Elasticsearch in the ELK stack In Detail The ELK stack—Elasticsearch, Logstash, and Kibana, is a powerful combination of open source tools. Elasticsearch is for deep search and data analytics. Logstash is for centralized logging, log enrichment, and parsing. Kibana is for powerful and beautiful data visualizations. In short, the Elasticsearch ELK stack makes searching and analyzing data easier than ever before. This book will introduce you to the ELK (Elasticsearch, Logstash, and Kibana) stack, starting by showing you how to set up the stack by installing the tools, and basic configuration. You’ll move on to building a basic data pipeline using the ELK stack. Next, you’ll explore the key features of Logstash and its role in the ELK stack, including creating Logstash plugins, which will enable you to use your own customized plugins. The importance of Elasticsearch and Kibana in the ELK stack is also covered, along with various types of advanced data analysis, and a variety of charts, tables ,and maps. Finally, by the end of the book you will be able to develop full-fledged data pipeline using the ELK stack and have a solid understanding of the role of each of the components. Style and approach This book is a step-by-step guide, complete with various examples to solve your data analytics problems by using the ELK stack to explore and visualize data.

A complete guide to dominating search engines with your WordPress siteAbout This BookEverything you need to get your WordPress site to the top of search engines and bring thousands of new customers to your blog or businessLearn everything from keyword research and link building to customer conversions, in this complete guidePacked with real-word examples to help get your site noticed on Google, Yahoo, and Bing Who This Book Is For This book is for anyone who runs any of the over 90,000,000 WordPress installations throughout the world. If you can login to your WordPress website, you can implement most of the tips in this book without any coding experience.What You Will LearnThe elements that search engines use to rank websites—and how to optimize your site for premium placementHarness social media sites to extend the reach of your site and gain more visitorsDiscover the high-volume, high-value search phrases that customers use when searching for your products or servicesAvoid dangerous black-hat optimization techniques and the people who advocate and purvey themBuild high-quality, high-value links from other websites to raise your rankings in search enginesCreate optimized and engaging content that both search engines and readers will loveAvoid common SEO mistakes that can get your site penalized by search engines In Detail WordPress is a powerful platform for creating feature-rich and attractive websites but, with a little extra tweaking and effort, your WordPress site can dominate search engines and bring thousands of new customers to your business. WordPress Search Engine Optimization will show you the secrets that professional SEO companies use to take websites to the top of search results. You'll take your WordPress site to the next level; you'll brush aside even the stiffest competition with the advanced tutorials in this book.Style and approach This is a practical, hands-on book based around sound SEO techniques specifically applied to WordPress. Each chapter starts with a brief overview of the important concepts then quickly moves into practical step-by-step actions you can take immediately. Throughout the book, you'll get clear instructions and detailed screenshots, so you can see exactly what to do each step of the way.

Unleash the true potential of Ubuntu Server in your production environment using this administration guide About This Book Learn how to deploy and configure Ubuntu servers and work with cloud and hyper-visors Optimize network traffic to broadcast and multicast the traffic flow in OpenStack clouds Discover the essentials of the latest version of Ubuntu, which are good in both looks and performance, using this fast-paced guide Who This Book Is For This book is for system administrators who are familiar with the fundamentals of the Linux operating system and are looking for a fast-paced guide on Ubuntu, and those who are familiar with the older versions of Ubuntu and want to get up to scratch. Basic knowledge of Linux administration is assumed. What You Will Learn Install and set up Ubuntu Server in the shortest possible time, manually as well as in an automated way, for a single server or hundreds of servers Discover the fundamentals of the Ubuntu command-line interface Configure and administer Ubuntu Server using networking and CLI Deploy servers on Ubuntu in the simplest and fastest ways Enhance security within Ubuntu Server using tools such as firewalls, IDS, and IPS and procedures such as restore, rescue, and recovery Work with virtualization, clouds, and one of the best in open source cloud computing —OpenStack Optimize CLI for grep and exec commands and gain some best tips and tricks for Ubuntu Server administration In Detail Ubuntu is a Debian-based Linux operating system built on top of the Debian architecture. It is used to make operating systems for multiple platforms, including phones, desktops, TVs and mobiles. It has made some serious progress in the realms of efficiency and user friendliness. With evolving technology trends, demands on software have changed, with more and more skilled users. Over the past few years, services such as Facebook, Twitter, and push notifications on smartphones mean that users are used to being up to date with everything that happens all the time. With SignalR, the applications stay connected and will generate notifications when something happens either from the system or by other users. This provides new opportunities for the system administrators, to enter this new and exciting world of real-time application development. This is a concise and a cost-friendly guide, packed with up-to-date essentials on Ubuntu Server fundamentals. It will guide you through deploying and configuring Ubuntu servers in your office environments. You’ll start by installing Ubuntu Server, then move to the most useful aspect —the command-line interface inside it. You’ll extend your knowledge by learning how to administrate and configure Ubuntu Server. You will also see how to deploy services on Ubuntu Server and find out how to secure it. You’ll get to grips with the virtualization and cloud computing facilities provided by Ubuntu, and finally, you’ll gain some very useful tips. Style and approach This concise and easy-to-follow guide follows a step-by-step approach to help you master Ubuntu server, no matter what your level of expertise it. Each topic is explained sequentially with both essential information and whenever needed, in-depth references.

Wield the power of OpenStack Neutron networking to bring network infrastructure and capabilities to your cloud About This Book This completely up-to-date edition will show you how to deploy a cloud on OpenStack using community-driven processes. It includes rich examples that will help you understand complex networking topics with ease Understand every aspect of designing, creating, customizing, and maintaining the core network foundation of an OpenStack cloud using OpenStack Neutron all in one book Written by best-selling author James Denton, who has more than 15 years of experience in system administration and networking. James has experience of deploying, operating, and maintaining OpenStack clouds and has worked with top enterprises and organizations Who This Book Is For If you are an OpenStack-based cloud operator and administrator who is new to Neutron networking and wants to build your very own OpenStack cloud, then this book is for you. Prior networking experience and a physical server and network infrastructure is recommended to follow along with concepts demonstrated in the book. What You Will Learn Architect and install the latest release of OpenStack on Ubuntu Linux 14.04 LTS Review the components of OpenStack networking, including plugins, agents, and services, and learn how they work together to coordinate network operations Build a virtual switching infrastructure using reference architectures based on ML2 + Open vSwitch or ML2 + LinuxBridge Create networks, subnets, and routers that connect virtual machine instances to the network Deploy highly available routers using DVR or VRRP-based methods Scale your application with haproxy and Load Balancing as-a-Service Implement port and router-level security using Security Groups and Firewall as-a-Service Provide connectivity to tenant networks with Virtual Private Networking as-a-Service (VPNaaS) Find out how to manage OpenStack networking resources using CLI and GUI-driven methods In Detail OpenStack Neutron is an OpenStack component that provides networking as a service for other OpenStack services to architect networks and create virtual machines through its API. This API lets you define network connectivity in order to leverage network capabilities to cloud deployments. Through this practical book, you will build a strong foundational knowledge of Neutron, and will architect and build an OpenStack cloud using advanced networking features. We start with an introduction to OpenStack Neutron and its various components, including virtual switching, routing, FWaaS, VPNaaS, and LBaaS. You’ll also get hands-on by installing OpenStack and Neutron and its components, and use agents and plugins to orchestrate network connectivity and build a virtual switching infrastructure. Moving on, you’ll get to grips with the HA routing capabilities utilizing VRRP and distributed virtual routers in Neutron. You’ll also discover load balancing fundamentals, including the difference between nodes, pools, pool members, and virtual IPs. You’ll discover the purpose of security groups and learn how to apply the security concept to your cloud/tenant/instance. Finally, you'll configure virtual private networks that will allow you to avoid the use of SNAT and floating IPs when connecting to remote networks. Style and approach This easy-to-follow guide on networking in OpenStack follows a step-by-step process to installing OpenStack and configuring the base networking components. Each major networking component has a dedicated chapter that will build on your experience gained from prior chapters.

In one of the most acclaimed novels in recent memory, Edward P. Jones, two-time National Book Award finalist, tells the story of Henry Townsend, a black farmer and former slave who falls under the tutelage of William Robbins, the most powerful man in Manchester County, Virginia. Making certain he never circumvents the law, Townsend runs his affairs with unusual discipline. But when death takes him unexpectedly, his widow, Caldonia, can't uphold the estate's order and chaos ensues. In a daring and ambitious novel, Jones has woven a footnote of history into an epic that takes an unflinching look at slavery in all of its moral complexities. This P.S. edition features an extra 16 pages of insights into the book, including author interviews, recommended reading, and more.

In the spirit of Alvin Toffler Future Shock , a social critique of our obsession with choice, and how it contributes to anxiety, dissatisfaction and regret. This paperback includes a new P.S. section with author interviews, insights, features, suggested readings, and more. Whether we're buying a pair of jeans, ordering a cup of coffee, selecting a long-distance carrier, applying to college, choosing a doctor, or setting up a 401(k), everyday decisions--both big and small--have become increasingly complex due to the overwhelming abundance of choice with which we are presented. We assume that more choice means better options and greater satisfaction. But beware of excessive choice: choice overload can make you question the decisions you make before you even make them, it can set you up for unrealistically high expectations, and it can make you blame yourself for any and all failures. In the long run, this can lead to decision-making paralysis, anxiety, and perpetual stress. And, in a culture that tells us that there is no excuse for falling short of perfection when your options are limitless, too much choice can lead to clinical depression. In The Paradox of Choice , Barry Schwartz explains at what point choice--the hallmark of individual freedom and self-determination that we so cherish--becomes detrimental to our psychological and emotional well-being. In accessible, engaging, and anecdotal prose, Schwartz shows how the dramatic explosion in choice--from the mundane to the profound challenges of balancing career, family, and individual needs--has paradoxically become a problem instead of a solution. Schwartz also shows how our obsession with choice encourages us to seek that which makes us feel worse. By synthesizing current research in the social sciences, Schwartz makes the counterintuitive case that eliminating choices can greatly reduce the stress, anxiety, and busyness of our lives. He offers eleven practical steps on how to limit choices to a manageable number, have the discipline to focus on the important ones and ignore the rest, and ultimately derive greater satisfaction from the choices you have to make.

Long before there were creative-writing workshops and degrees, how did aspiring writers learn to writeBy reading the work of their predecessors and contemporaries, says Francine Prose. In Reading Like a Writer , Prose invites you to sit by her side and take a guided tour of the tools and the tricks of the masters. She reads the work of the very best writers—Dostoyevsky, Flaubert, Kafka, Austen, Dickens, Woolf, Chekhov—and discovers why their work has endured. She takes pleasure in the long and magnificent sentences of Philip Roth and the breathtaking paragraphs of Isaac Babel; she is deeply moved by the brilliant characterization in George Eliot's Middlemarch . She looks to John Le Carr for a lesson in how to advance plot through dialogue, to Flannery O'Connor for the cunning use of the telling detail, and to James Joyce and Katherine Mansfield for clever examples of how to employ gesture to create character. She cautions readers to slow down and pay attention to words, the raw material out of which literature is crafted. Written with passion, humor, and wisdom, Reading Like a Writer will inspire readers to return to literature with a fresh eye and an eager heart.

2 March 1810 . . . Today, I fell in love. At the age of ten, Miranda Cheever showed no signs of Great Beauty. And even at ten, Miranda learned to accept the expectations society held for her until the afternoon when Nigel Bevelstoke, the handsome and dashing Viscount Turner, solemnly kissed her hand and promised her that one day she would grow into herself, that one day she would be as beautiful as she already was smart. And even at ten, Miranda knew she would love him forever. But the years that followed were as cruel to Turner as they were kind to Miranda. She is as intriguing as the viscount boldly predicted on that memorable day while he is a lonely, bitter man, crushed by a devastating loss. But Miranda has never forgotten the truth she set down on paper all those years earlier and she will not allow the love that is her destiny to slip lightly through her fingers . . .

New York Times bestseller Lirael is perfect for fans of epic fantasy like Game of Thrones . In this sequel to the critically acclaimed Sabriel, Garth Nix draws readers deeper into the magical landscape of the Old Kingdom. Lirael has never felt like a true daughter of the Clayr. Abandoned by her mother, ignorant of her father identity, Lirael resembles no one else in her large extended family living in the Clayr glacier. She doesn't even have the Sight the ability to see into possible futures that is the very birthright of the Clayr. Nevertheless she must undertake a desperate mission under the growing shadow of an ancient evil one that opposes the Royal Family, blocks the Sight of the Clayr, and threatens to break the very boundary between Life and Death itself. With only her faithful companion, the Disreputable Dog, to help her, Lirael must find the courage to seek her own hidden destiny.

There's trouble at the Castle, and it's all because Merrin Meredith has returned with Darke plans for Septimus. More trouble awaits Septimus and Jenna in the form of Tertius Fume, the ghost of the very first Chief Hermetic Scribe, who is determined to send Septimus on a deadly Queste. But Septimus and Jenna have other plans they are headed for the mysterious House of Foryx, a place where all Time meets and the place where they fervently hope they will be able to find Nicko and Snorri, who were trapped back in time in physik. But how will Septimus escape the QuesteQueste , like all the books in the Septimus Heap series, is filled with nonstop action, humor, and fantastical adventure as Septimus continues his journey of Magykal self-discovery.

Dear Reader, I'm sorry to say that the book you are holding in your hands is extremely unpleasant. It tells an unhappy tale about three very unlucky children. Even though they are charming and clever, the Baudelaire siblings lead lives filled with misery and woe. From the very first page of this book when the children are at the beach and receive terrible news, continuing on through the entire story, disaster lurks at their heels. One might say they are magnets for misfortune. In this short book alone, the three youngsters encounter a greedy and repulsive villain, itchy clothing, a disastrous fire, a plot to steal their fortune, and cold porridge for breakfast. It is my sad duty to write down these unpleasant tales, but there is nothing stopping you from putting this book down at once and reading something happy, if you prefer that sort of thing. With all due respect, Lemony Snicket

Warning: Your day will become very dark - and possibly damp - if you read this book. Plan to spend this spring in hiding. Lemony Snicket is back with the eleventh book in his New York Times bestselling A Series of Unfortunate Events. Lemony Snicket's saga about the charming, intelligent and grossly unlucky Baudelaire orphans continues to provoke suspicion and despair in readers the world over. In the eleventh and most alarming volume yet in the bestselling phenomenon A Series of Unfortunate Events, the intrepid siblings delve further into the dark mystery surrounding the death of their parents and the baffling VFD organisation. Ages 9+

Dear Reader You have undoubtedly picked up this book by mistake so please put it down. Nobody in their right mind would read this particular book about the lives of Violet Klaus and Sunny Baudelaire on purpose because each dismal moment of their stay in the village of V.F.D. has been faithfully and dreadfully recorded in these pages.I can think of no single reason why anyone would want to open a book containing such unpleasant matters as migrating crows an angry mob a newspaper headline the arrest of innocent people the Deluxe Cell and some very strange hats.It is my solemn and sacred occupation to research each detail of the Baudelaire childrens lives and write them all down but you may prefer to do some other solemn and sacred thing such as reading another book instead.With all due respect Lemony Snicket Ages 10+

The blue jays and cardinals of Stone-Run Forest have turned against each other. According to legend, only Swordbird, son of the Great Spirit, has the power to conquer evil and restore peace to the land. But is he real or just a mythCan Swordbird arrive in time to save the forest . . . or will it be too lateTwelve-year-old author Nancy Yi Fan has woven a captivating tale about the birds of Stone-Run Forest and the heroism, courage, and resourcefulness in their quest for peace.

Young Tristran Thorn will do anything to win the cold heart of beautiful Victoria even fetch her the star they watch fall from the night sky. But to do so, he must enter the unexplored lands on the other side of the ancient wall that gives their tiny village its name. Beyond that old stone wall, Tristran learns, lies Faerie where nothing, not even a fallen star, is what he imagined. From #1 New York Times bestselling author Neil Gaiman comes a remarkable quest into the dark and miraculous in pursuit of love and the utterly impossible.

Chicago Stars quarterback Dean Robillard is the luckiest man in the world: a bona-fide sports superstar and the pride of the NFL with a profitable side career as a buff billboard model for End Zone underwear. But life in the glory lane has started to pale, and Dean has set off on a cross-country trip to figure out what's gone wrong. When he hits a lonely stretch of Colorado highway, he spies something that will shake up his gilded life in ways he can't imagine. A young woman . . . dressed in a beaver suit. Blue Bailey is on a mission to murder her ex. Or at least inflict serious damage. As for the beaver suit she's wearing . . . Is it her fault that life keeps throwing her curveballsWitness the expensive black sports car pulling up next to her on the highway and the Greek god stepping out of it. Blue's career as a portrait painter is the perfect job for someone who refuses to stay in one place for very long. She needs a ride, and America's most famous football player has an imposing set of wheels. Now, all she has to do is keep him entertained, off guard, and fully clothed before he figures out exactly how desperate she is. But Dean isn't the brainless jock she imagines, and Blue despite her petite stature is just about the toughest woman Dean has ever met. They're soon heading for his summer home where their already complicated lives and inconvenient attraction to each other will become entangled with a charismatic but aging rock star; a beautiful fifty-two-year-old woman trying to make peace with her rock and roll past; an eleven-year-old who desperately needs a family; and a bitter old woman who hates them all. As the summer progresses, the wandering portrait artist and the charming football star play a high-stakes game, fighting themselves and each other for a chance to have it all. Natural Born Charmer is for everyone who's ever thought about leaving their old life in the dust and never looking back. Susan Elizabeth Phillips takes us home again . . . and shows us where love truly lives.

Barbarians at the Gate has been called one of the most influential business books of all time -- the definitive account of the largest takeover in Wall Street history. Bryan Burrough and John Helyar's gripping account of the frenzy that overtook Wall Street in October and November of 1988 is the story of deal makers and publicity flaks, of strategy meetings and society dinners, of boardrooms and bedrooms -- giving us not only a detailed look at how financial operations at the highest levels are conducted but also a richly textured social history of wealth at the twilight of the Reagan era. Barbarians at the Gate -- a business narrative classic -- is must reading for everyone interested in the way today's world really works.

Small-time stoolie, Jake " The Spinner" Jablon, made a lot of new enemies when he switched careers, from informer to blackmailer. And the more "clients", he figured, the more money -- and more people eager to see him dead. So no one is surprised when the pigeon is found floating in the East River with his skull bashed in.And what's worse, no one cares -- except Matthew Scudder. The ex-cop-turned-private-eye is no conscientious avenging angel. But he's willing to risk his own life and limb to confront Spinner's most murderously aggressive marks. A job's a job after all -- and Scudder's been paid to find a killer -- by the victim...in advance.

Lao-tzu's Tao Te Ching, or Book of the Way, is the classic manual on the art of living and one of the wonders of the world. In eighty-one brief chapters, the Tao Te Ching llods at the basic predicatment of being alive and gives advice that imparts balance and perspective, a serene and generous spirit. This book is about wisdom in action. It teaches how wo work for the good with the efforless skill that comes from being in accord with the Tao (the basic principle of the universe) and applies equally to good government and sexual love, to childrearing, business, and ecology. The Tao Te Ching is the most widely traslated book in world literature, after the Bible. Yet the gemlike lucidity of the original has eluded most previous translations, and they have obscured some of its central ideas. Now the Tao Te ching has been rendered into English by the eminent scholar and traslator Stephen Mitchell. Mr. Mitchell's Dropping Ashes on the Buddha is a modern Zen classic, and his translations of Rilke and of the Book of Job have already been called definitive for our time.

Illuminating and essential, Big Questions from Little People is a timeless gift, a handbook for curious children and their perplexed parents. Many of the questions children ask in the course of growing up can stump even the best educated adult: Why can't I tickle myselfAre we all relatedWho named all the citiesDo aliens existWhat makes me meIs it okay to eat a wormWho invented chocolateIf the universe started from nothing, how did it become somethingHow do you fall in loveWho is GodHow do chefs get ideas for recipesWhy are some people meanThis charming and informative collection has been compiled from schoolchildren's actual questions, which are answered by the world's greatest experts, including Mary Roach, Richard Dawkins, Philip Pullman, Bear Grylls, David Eagleman, Philippa Gregory, Noam Chomsky, and Mario Batali.