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Hattem - Mastering Python

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Book:
Mastering Python
Author:
Hattem / Rick van
Publisher:
Packt Publishing
Genre:
Books / Computer
Year:
2016
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Mastering Python: summary, description and annotation

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Master the art of writing beautiful and powerful Python by using all of the features that Python 3.5 offersAbout This BookBecome familiar with the most important and advanced parts of the Python code styleLearn the trickier aspects of Python and put it in a structured context for deeper understanding of the languageOffers an experts-eye overview of how these advanced tasks fit together in Python as a whole along with practical examplesWho This Book Is ForAlmost anyone can learn to write working script and create high quality code but they might lack a structured understanding of what it means to be Pythonic. If you are a Python programmer who wants to code efficiently by getting the syntax and usage of a few intricate Python techniques exactly right, this book is for you. What You Will LearnCreate a virtualenv and start a new projectUnderstand how and when to use the functional programming paradigmGet familiar with the different ways the decorators can be written inUnderstand the power of generators and coroutines without digressing into lambda calculusCreate metaclasses and how it makes working with Python far easierGenerate HTML documentation out of documents and code using SphinxLearn how to track and optimize application performance, both memory and cpuUse the multiprocessing library, not just locally but also across multiple machinesGet a basic understanding of packaging and creating your own libraries/applicationsIn DetailPython is a dynamic programming language. It is known for its high readability and hence it is often the first language learned by new programmers. Python being multi-paradigm, it can be used to achieve the same thing in different ways and it is compatible across different platforms. Even if you find writing Python code easy, writing code that is efficient, easy to maintain, and reuse is not so straightforward. This book is an authoritative guide that will help you learn new advanced methods in a clear and contextualised way. It starts off by creating a project-specific environment using venv, introducing you to different Pythonic syntax and common pitfalls before moving on to cover the functional features in Python. It covers how to create different decorators, generators, and metaclasses. It also introduces you to functools.wraps and coroutines and how they work. Later on you will learn to use asyncio module for asynchronous clients and servers. You will also get familiar with different testing systems such as py.test, doctest, and unittest, and debugging tools such as Python debugger and faulthandler. You will learn to optimize application performance so that it works efficiently across multiple machines and Python versions. Finally, it will teach you how to access C functions with a simple Python call. By the end of the book, you will be able to write more advanced scripts and take on bigger challenges. Style and ApproachThis book is a comprehensive guide that covers advanced features of the Python language, and communicate them with an authoritative understanding of the underlying rationale for how, when, and why to use them.;Cover; Copyright; Credits; About the Author; About the Reviewers; www.PacktPub.com; Table of Contents; Preface; Chapter 1: Getting Started -- One Environment per Project; Creating a virtual Python environment using venv; Creating your first venv; venv arguments; Differences between virtualenv and venv; Bootstrapping pip using ensurepip; ensurepip usage; Manual pip install; Installing C/C++ packages; Debian and Ubuntu; Red Hat, CentOS, and Fedora; OS X; Windows; Summary; Chapter 2: Pythonic Syntax, Common Pitfalls, and Style Guide; Code style -- or what is Pythonic code?

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Mastering Python

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: April 2016

Production reference: 1270416

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78528-972-9

www.packtpub.com

Credits

Author

Rick van Hattem

Reviewers

Randall Degges

Dave de Fijter

I. de Hoogt

Commissioning Editor

Sarah Crofton

Acquisition Editor

Reshma Raman

Content Development Editor

Arun Nadar

Technical Editors

Ryan Kochery

Tanmayee Patil

Copy Editor

Vikrant Phadke

Project Coordinator

Suzanne Coutinho

Proofreader

Safis Editing

Indexer

Mariammal Chettiyar

Production Coordinator

Nilesh Mohite

Cover Work

Nilesh Mohite

About the Author

Rick van Hattem is an experienced programmer, entrepreneur, and software/database architect with over 20 years of programming experience, including 15 with Python. Additionally, he has a lot of experience with high-performance architectures featuring large amounts of concurrent users and/or data.

Rick has founded several start-ups and has done consulting for many companies, including a few Y Combinator start-ups and several large companies. One of the startups he founded, Fashiolista.com, is one of the largest social networks for fashion in the world, featuring millions of users and the performance challenges to accompany those.

Rick was one of the reviewers on the book PostgreSQL Server Programming , Packt Publishing .

Thanks to my family, in particular Marloes, who supported me every step of the way; and my mother and sister, who have always been there for me.

About the Reviewers

Randall Degges is a happy programmer, speaker, author, and amateur bodybuilder living in California.

Growing up in Los Angeles, he was intensely interested in building command-line programs and writing quality software. His love of programming eventually propelled him into a successful career in software development.

Randall has been a life-long open source developer and has contributed to hundreds of popular projects in Python, Node.js, and Go. He's also the author of several popular libraries, which you can find on his public GitHub account at https://github.com/rdegges.

At 23, he cofounded an extremely popular API service in the telephony industry: OpenCNAM (https://www.opencnam.com). At 25, he joined Stormpath (https://stormpath.com) as the head of developer evangelism, whereby he writes open source security libraries full time and travels the world giving technical talks about building secure software.

In his free time, Randall writes and edits technical books, runs a security podcast called Stormcast (https://www.stormca.st), posts blogs on his personal website (https://www.rdegges.com), and tries to spend time with his high-school sweetheart, Samantha.

Dave de Fijter is a Python developer from the Netherlands. He always knew he would end up "doing something with computers." At a young age, he went to the library to read books about them even though he had no computer at that time. This obsession never really ended. In 2001, aged 14, he started his first part-time job, creating dynamic websites in PHP for a local web development company, and there he found his calling.

In 2007, he finished his bachelor's degree in ICT while already working full time as a PHP developer for over a year. In 2008, he switched from PHP to Python and Django for web development and loved this new technology stack so much that he never looked back.

After working as a Python developer for various start-ups and established companies, Dave used this experience to start his own business called Indentity (https://indentity.nl) in 2010, focusing on Python/Django development and advice. Up until now, he runs this company and mainly spends his time helping out start-ups with designing and building technologically advanced web applications from the ground up as an interim CTO/technical cofounder.

I. de Hoogt , with some basic experience wrought from university assignments in the field of modeling of multi-phase flows, got himself started in software development. His main experience in programming in Python stems from an internship at a company dealing in 3D printing software, where a package resulting in optimized object orientation and guaranteed mathematical mesh validity was created.

Other projects that he's been involved with have dealt with control systems such as self-parking cars, multi-legged robots, and quadcopters, but his current job is in the field of data analysis.

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Preface

Python is a language that is easy to learn and both powerful and convenient from the start. Mastering Python, however, is a completely different question.

Every programming problem you will encounter has at least several possible solutions and/or paradigms to apply within the vast possibilities of Python. This book will not only illustrate a range of different and new techniques but also explain where and when a method should be applied.

This book is not a beginner's guide to Python 3. It is a book that can teach you about the more advanced techniques possible within Python. Specifically targeting Python 3.5 and up, it also demonstrates several Python 3.5-only features such as async def and await statements.

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