OReilly Think Python (2012).pdf

Think Python

Allen B. Downey

Think Python

by Allen B. Downey

Printed in the United States of America.

Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.

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Editors: Mike Loukides and Meghan Blanchette

Production Editor: Rachel Steely

Proofreader: Stacie Arellano

Cover Designer: Karen Montgomery

Interior Designer: David Futato

Illustrators: Robert Romano and Rebecca Demarest

August 2012:

First Edition

Revision History for the First Edition:

2012-08-03

First release

See http://oreilly.com/catalog/errata.csp?isbn=9781449330729 for release details.

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Think Python is available under the Creative Commons Attribution-NonCommercial 3.0 Unported License .

The author maintains an online version at http://thinkpython.com/thinkpython.pdf .

While every precaution has been taken in the preparation of this book, the publisher and authors assume

no responsibility for errors or omissions, or for damages resulting from the use of the information contained

herein.

ISBN: 978-1-449-33072-9

[LSI]

Table of Contents

Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi

The Way of the Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

The Python Programming Language 1

What Is a Program? 3

What Is Debugging? 4

Syntax Errors 4

Runtime Errors 4

Semantic Errors 5

Experimental Debugging 5

Formal and Natural Languages 6

The First Program 7

Debugging 8

Glossary 9

Exercises 11

Variables, Expressions, and Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Values and Types 13

Variables 14

Variable Names and Keywords 15

Operators and Operands 16

Expressions and Statements 16

Interactive Mode and Script Mode 17

Order of Operations 18

String Operations 18

Comments 19

Debugging 19

Glossary 20

iii

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