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López Félix - Mastering Python regular expressions

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López Félix Mastering Python regular expressions

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In DetailRegular expressions are used by many text editors, utilities, and programming languages to search and manipulate text based on patterns. They are considered the Swiss army knife of text processing. Powerful search, replacement, extraction and validation of strings, repetitive and complex tasks are reduced to a simple pattern using regular expressions.Mastering Python Regular Expressions will teach you about Regular Expressions, starting from the basics, irrespective of the language being used, and then it will show you how to use them in Python. You will learn the finer details of what Python supports and how to do it, and the differences between Python 2.x and Python 3.x.The book starts with a general review of the theory behind the regular expressions to follow with an overview of the Python regex module implementation, and then moves on to advanced topics like grouping, looking around, and performance.You will explore how to leverage Regular Expressions in Python, some advanced aspects of Regular Expressions and also how to measure and improve their performance. You will get a better understanding of the working of alternators and quantifiers. Also, you will comprehend the importance of grouping before finally moving on to performance optimization techniques like the RegexBuddy Tool and Backtracking.Mastering Python Regular Expressions provides all the information essential for a better understanding of Regular Expressions in Python.ApproachA short and straight to the point guide that explains the implementation of Regular Expressions in Python.Who this book is forThis book is aimed at Python developers who want to learn how to leverage Regular Expressions in Python. Basic knowledge of Python is required for a better understanding.

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Mastering Python Regular Expressions

Mastering Python Regular Expressions

Copyright 2014 Packt Publishing

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 authors, 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: February 2014

Production Reference: 1140214

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78328-315-6

www.packtpub.com

Cover Image by Gagandeep Sharma (<>)

Credits

Authors

Flix Lpez

Vctor Romero

Reviewers

Mohit Goenka

Jing (Dave) Tian

Acquisition Editors

James Jones

Mary Jasmine Nadar

Content Development Editor

Rikshith Shetty

Technical Editors

Akashdeep Kundu

Faisal Siddiqui

Copy Editors

Roshni Banerjee

Sarang Chari

Project Coordinator

Sageer Parkar

Proofreader

Linda Morris

Indexer

Priya Subramani

Graphics

Ronak Dhruv

Abhinash Sahu

Production Coordinator

Nitesh Thakur

Cover Work

Nitesh Thakur

About the Authors

Flix Lpez started his career in web development before moving to software in the currency exchange market, where there were a lot of new security challenges. Later, he spent four years creating an IDE to develop games for hundreds of different mobile device OS variations, in addition to creating more than 50 games. Before joining ShuttleCloud, he spent two years working on applications with sensor networks, Arduino, ZigBee, and custom hardware. One example is an application that detects the need for streetlight utilities in major cities based on existing atmospheric brightness. His first experience with Python was seven years ago, He used it for small scripts, web scrapping, and so on. Since then, he has used Python for almost all his projects: websites, standalone applications, and so on. Nowadays, he uses Python along with RabbitMQ in order to integrate services.

He's currently working for ShuttleCloud, an U.S.-based startup, whose technology is used by institutions such as Stanford and Harvard, and companies such as Google.

I would like to thank @panchoHorrillo for helping me with some parts of the book and especially my family for supporting me, despite the fact that I spend most of my time with my work ;)

Vctor Romero currently works as a solutions architect at MuleSoft, Inc. He started his career in the dotcom era and has been a regular contributor to open source software ever since. Originally from the sunny city of Malaga, Spain, his international achievements include integrating the applications present in the cloud storage of a skyscraper in New York City, and creating networks for the Italian government in Rome.

I would like to thank my mom for instilling the love of knowledge in me, my grandmother for teaching me the value of hard work, and the rest of my family for being such an inspiration. I would also like to thank my friends and colleagues for their unconditional support during the creation of this book.

About the Reviewers

Mohit Goenka graduated from the University of Southern California (USC) with an M.Sc. in computer science. His thesis emphasized on Game Theory and Human Behavior concepts as applied in real-world security games. He also received an award for academic excellence from the Office of International Services at USC. He has showcased his presence in various realms of computers, including artificial intelligence, machine learning, path planning, multiagent systems, neural networks, computer vision, computer networks, and operating systems.

During his years as a student, Mohit won multiple competitions cracking codes and presented his work on Detection of Untouched UFOs to a wide audience. Not only is he a software developer by profession, but coding is also his hobby. He spends most of his free time learning about new technology and grooming his skills.

What adds a feather to his cap is Mohit's poetic skills. Some of his works are part of the University of Southern California Libraries archive under the cover of The Lewis Carroll Collection . In addition to this, he has made significant contributions by volunteering his time to serve the community.

Jing (Dave) Tian is now a graduate research fellow and a Ph.D student in the computer science department at the University of Oregon. He is a member of OSIRIS lab. His research direction involves system security, embedded system security, trusted computing, and static analysis for security and virtualization. He also spent a year on artificial intelligence and machine learning direction, and taught the Intro to Problem Solving using Python class in the department. Before that, he worked as a software developer at Linux Control Platform (LCP) group in the Alcatel-Lucent (formerly Lucent Technologies) research and development for around four years. He has got B.S. and M.E. degrees from EE in China.

I would like to thank the author of the book, who has done a good job for both Python and regular expressions. I would also like to thank the editors of the book, who made this book perfect and offered me the opportunity to review such a nice book.

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