this site will maintain this edition' official list of book errataand chronicle specific patches applied to the text in reprints it' also the official site for the book' examples as described earlier author' sitethis site will be used to post more general updates related to this text or python itself-- hedge against future changeswhich should be considered sort of virtual appendix to this book my publisher also has an email address for comments and technical questions about this bookbookquestions@oreilly com for more information about my publisher' booksconferencesresource centersand the 'reilly networksee its general websitefor more on my bookssee my own book support sitealso be sure to search the web if any of the preceding links become invalid over timeif could become more clairvoyanti wouldbut the web changes faster than published books acknowledgments as write this fifth edition of this book in it' difficult to not be somewhat retrospective have now been using and promoting python for yearswriting books about it for and teaching live classes on it for despite the passage of timei' still regularly amazed at how successful python has been--in ways that most of us could not possibly have imagined in the early so at the risk of sounding like hopelessly self-absorbed authori hope you'll pardon few closing words of history and gratitude here the backstory my own python history predates both python and the web (and goes back to time when an install meant fetching email messagesconcatenatingdecodingand hoping it all somehow workedwhen first discovered python as frustrated +software developer in had no idea what an impact it would have on the next two decades of my life two years after writing the first edition of programming python in for python began traveling around the country and world teaching python to beginners and experts since finishing the first edition of learning python in xlviii preface