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Beginning Python
Visualization
Crafting Visual Transformation
Scripts
Shai Vaingast
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Beginning Python Visualization: Crafting Visual Transformation Scripts
Copyright © 2009 by Shai Vaingast
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying, recording, or by any information storage or retrieval
system, without the prior written permission of the copyright owner and the publisher.
ISBN-13 (pbk): 978-1-4302-1843-2
ISBN-13 (electronic): 978-1-4302-1844-9
Printed and bound in the United States of America 9 8 7 6 5 4 3 2 1
Trademarked names may appear in this book. Rather than use a trademark symbol with every occurrence
of a trademarked name, we use the names only in an editorial fashion and to the benefit of the trademark
owner, with no intention of infringement of the trademark.
Lead Editors: Frank Pohlmann, Michelle Lowman
Technical Reviewer: C. Titus Brown
Editorial Board: Clay Andres, Steve Anglin, Mark Beckner, Ewan Buckingham, Tony Campbell,
Gary Cornell, Jonathan Gennick, Michelle Lowman, Matthew Moodie, Jeffrey Pepper,
Frank Pohlmann, Ben Renow-Clarke, Dominic Shakeshaft, Matt Wade, Tom Welsh
Project Manager: Kylie Johnston
Copy Editor: Ami Knox
Associate Production Director: Kari Brooks-Copony
Production Editor: Kelly Winquist
Compositor: Dina Quan
Proofreader: Liz Welch
Indexer: Julie Grady
Artist: April Milne
Cover Designer: Kurt Krames
Manufacturing Director: Tom Debolski
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New York, NY 10013. Phone 1-800-SPRINGER, fax 201-348-4505, e-mail kn`ano)ju<olnejcan)o^i*_ki , or
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For information on translations, please contact Apress directly at 2855 Telegraph Avenue, Suite 600,
Berkeley, CA 94705. Phone 510-549-5930, fax 510-549-5939, e-mail ejbk<]lnaoo*_ki , or visit dppl6++sss*
]lnaoo*_ki .
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The information in this book is distributed on an “as is” basis, without warranty. Although every precau-
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rectly by the information contained in this work.
The source code for this book is available to readers at dppl6++sss*]lnaoo*_ki .
This book is dedicated to my wife, Orna Vaingast.
Contents at a Glance
About the Author .................................................................. xv
About the Technical Reviewer ......................................................xvi
Acknowledgments ............................................................... xvii
Introduction .....................................................................xviii
CHAPTER 1 Navigating the World of Data Visualization ........................1
CHAPTER 2 The Environment ...............................................31
CHAPTER 3 Python for Programmers ........................................53
CHAPTER 4 Data Organization .............................................101
CHAPTER 5 Processing Text Files ..........................................135
CHAPTER 6 Graphs and Plots ..............................................183
CHAPTER 7 Math Games ..................................................221
CHAPTER 8 Science and Visualization ......................................249
CHAPTER 9 Image Processing .............................................285
CHAPTER 10 Advanced File Processing .....................................319
APPENDIX
INDEX .......................................................................349
v
Additional Source Listing ......................................343
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