Learning Python - UPV/EHU

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Learning PythonFOURTH EDITIONLearning PythonMark LutzBeijing Cambridge Farnham K ln Sebastopol Taipei TokyoLearning Python , Fourth Editionby Mark LutzCopyright 2009 Mark Lutz. All rights in the United States of by O Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA Reilly books may be purchased for educational, business, or sales promotional use. Online editionsare also available for most titles ( ). For more information, contact ourcorporate/institutional sales department: (800) 998-9938 or SteeleProduction Editor:Sumita MukherjiCopyeditor:Rachel HeadProduction Services:Newgen North AmericaIndexer:John BickelhauptCover Designer:Karen MontgomeryInterior Designer:David FutatoIllustrator:Robert RomanoPrinting History:March 1999:First Edition. December 2003:Second Edition. October 2007:Third Edition. September 2009: Fourth Edition. Nutshell Handbook, the Nutshell Handbook logo, and the O Reilly logo are registered trademarks ofO Reilly Media, Inc.

A Tale of Two ifs 264 What Python Adds 264 What Python Removes 265 Why Indentation Syntax? 266 A Few Special Cases 269 A Quick Example: Interactive Loops 271 A Simple Interactive Loop 271 Doing Math on User Inputs 272 Handling Errors by Testing Inputs 273 Handling Errors with try Statements 274 Nesting Code Three Levels Deep 275 Chapter …