icons used in this book as you read this bookyou see icons in the margins that indicate material of interest (or notas the case may bethis section briefly describes each icon in this book tips are nice because they help you save time or perform some task without lot of extra work the tips in this book are time-saving techniques or pointers to resources that you should try in order to get the maximum benefit from python don' want to sound like an angry parent or some kind of maniacbut you should avoid doing anything marked with warning icon otherwiseyou could find that your program only serves to confuse userswho will then refuse to work with it whenever you see this iconthink advanced tip or technique you might find these tidbits of useful information just too boring for wordsor they could contain the solution you need to get program running skip these bits of information whenever you like if you don' get anything else out of particular or sectionremember the material marked by this icon this text usually contains an essential process or bit of information that you must know to write python programs successfully beyond the book this book isn' the end of your python programming experience -it' really just the beginning provide online content to make this book more flexible and better able to meet your needs that wayas receive -mail from youi can do things like address questions and tell you how updates to either python or its associated libraries affect book content in factyou gain access to all these cool additionscheat sheetyou remember using crib notes in school to make better mark on testdon' youyou dowella cheat sheet is sort of like that it provides you with some special notes about tasks that you can do with python that not every other developer knows you can find the cheat sheet for this book at inningprogrammingwithpython it contains really neat information like the top ten mistakes developers make when working with python and some of the python syntax that gives most developers problems