book

Sams Teach Yourself Python Programming for Raspberry Pi in 24 Hours, Second Edition

Name: Sams Teach Yourself Python Programming for Raspberry Pi in 24 Hours, Second Edition
ISBN: 9780134389585

by Richard Blum, Christine Bresnahan

December 2015

Beginner

624 pages

16h 30m

English

Sams

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About This E-Book
Title Page
Copyright Page
Contents at a Glance
Table of Contents
About the Authors
Dedication
Acknowledgments
We Want to Hear from You!
Reader Services

Introduction
Programming with PythonWho Should Read This Book?Conventions Used in This Book
Part I: Python Programming on the Raspberry Pi
Hour 1. Setting Up the Raspberry Pi
Obtaining a Raspberry PiExploring the Raspberry Pi’s HistoryUnderstanding How Python Relates to the Raspberry PiAcquiring a Raspberry PiDetermining the Necessary PeripheralsThe microSD CardPower SupplyOutput DisplayKeyboard and MouseUsing a Network Cable or Wi-Fi AdapterNice Additional PeripheralsChoosing a CasePortable Power SupplyLooking at a Self-Powered USB HubDeciding How to Purchase PeripheralsGetting Your Raspberry Pi WorkingDoing Your ResearchExploring the Installation SoftwareDownloading NOOBSMoving NOOBSPlugging In the PeripheralsTroubleshooting Your Raspberry PiCheck Your Peripheral CordsCheck Your microSD CardCheck Your Copy of NOOBSCheck Your DisplayCheck Your PeripheralsSummaryQ&AWorkshopQuizAnswers
Hour 2. Understanding the Raspbian Linux Distribution
Learning About LinuxInteracting with the Raspbian Command LineInteracting with the Raspbian GUIThe LXDE Graphical InterfaceThe LXPanelSummaryQ&AWorkshopQuizAnswers
Hour 3. Setting Up a Programming Environment
Exploring PythonA Little Python HistoryPython v3 Versus Python v2Checking Your Python EnvironmentChecking the Python Interpreter and Interactive ShellChecking the Python Development EnvironmentChecking for a Text EditorInstalling Python and ToolsChecking the KeyboardLearning About the Python InterpreterLearning About the Python Interactive ShellLearning About the Python Development EnvironmentThe IDLE Development Environment ShellCreating and Running Python ScriptsRunning a Python Script in the Interactive ShellRunning a Python Script in IDLEUsing IDLE to Create a Python ScriptUsing a Text Editor to Create a Python ScriptKnowing Which Tool to Use and WhenSummaryQ&AWorkshopQuizAnswers
Part II: Python Fundamentals
Hour 4. Understanding Python Basics
Producing Python Script OutputExploring the print FunctionUsing Characters as print Function ArgumentsFormatting Output with the print FunctionControlling Output with Escape SequencesNow for Something Fun!Formatting Scripts for ReadabilityLong Print LinesCreating CommentsUnderstanding Python VariablesPython KeywordsCreating Python Variable NamesAssigning Value to Python VariablesFormatting Variable and String OutputAvoiding Unassigned VariablesAssigning Long String Values to VariablesMore Variable AssignmentsReassigning Values to a VariableLearning About Python Data TypesAllowing Python Script InputSummaryQ&AWorkshopQuizAnswers
Hour 5. Using Arithmetic in Your Programs
Working with Math OperatorsPython Math OperatorsOrder of OperationsUsing Variables in Math CalculationsFloating-Point AccuracyDisplaying NumbersOperator ShortcutsCalculating with FractionsThe Fraction ObjectFraction OperationsUsing Complex Number MathCreating Complex NumbersComplex Number OperationsGetting Fancy with the math ModuleNumber Theory FunctionsPower and Logarithmic FunctionsTrigonometric FunctionsHyperbolic FunctionsStatistical Math FunctionsUsing the NumPy Math LibrariesNumPy Data TypesCreating NumPy ArraysUsing NumPy ArraysSummaryQ&AWorkshopQuizAnswers
Hour 6. Controlling Your Program
Working with the if StatementGrouping Multiple StatementsAdding Other Options with the else StatementAdding More Options Using the elif StatementComparing Values in PythonNumeric ComparisonsString ComparisonsBoolean ComparisonsEvaluating Function ResultsChecking Complex ConditionsUsing Logic OperatorsCombining Condition ChecksNegating a Condition CheckSummaryQ&AWorkshopQuizAnswers
Hour 7. Learning About Loops
Performing Repetitive TasksUsing the for Loop for IterationIterating Using Numeric Values in a ListWatching for a Few “Gotchas”Assigning Data Types from a ListIterating Using Character Strings in a ListIterating Using a VariableIterating Using the range FunctionUsing the while Loop for IterationIterating Using Numeric ConditionsIterating Using String ConditionsUsing while TrueCreating Nested LoopsSummaryQ&AWorkshopQuizAnswers
Part III: Advanced Python
Hour 8. Using Lists and Tuples
Introducing TuplesCreating TuplesAccessing Data in TuplesAccessing a Range of ValuesWorking with TuplesIntroducing ListsCreating a ListExtracting Data from a ListWorking with ListsUsing Multidimensional Lists to Store DataWorking with Lists and Tuples in Your ScriptsIterating Through a List or TupleSorting and Reversing RevisitedCreating Lists by Using List ComprehensionsWorking with RangesSummaryQ&AWorkshopQuizAnswers
Hour 9. Dictionaries and Sets
Understanding Python Dictionary TermsExploring Dictionary BasicsCreating a DictionaryPopulating a DictionaryObtaining Data from a DictionaryUpdating a DictionaryManaging a DictionaryProgramming with DictionariesUnderstanding Python SetsExploring Set BasicsPopulating a SetObtaining Information from a SetSet MembershipSet UnionSet IntersectionSet DifferenceSymmetric Set DifferenceTraversing a SetModifying a SetProgramming with SetsSummaryQ&AWorkshopQuizAnswers
Hour 10. Working with Strings
The Basics of Using StringsString FormatsCreating StringsHandling String ValuesUsing Functions to Manipulate StringsAltering String ValuesSplitting StringsJoining StringsTesting StringsSearching StringsFormatting Strings for OutputThe format() FunctionFormatting NumbersSummaryQ&AWorkshopQuizAnswers
Hour 11. Using Files
Understanding Linux File StructuresLooking at Linux DirectoriesManaging Files and Directories via PythonOpening a FileDesignating the Open ModeUsing File Object MethodsReading a FileReading an Entire FileReading a File Line-by-LineReading a File in a Nonsequential MannerClosing a FileWriting to a FileCreating and Writing to a New FileWriting to a Preexisting FileSummaryQ&AWorkshopQuizAnswers
Hour 12. Creating Functions
Utilizing Python Functions in Your ProgramsCreating a FunctionUsing FunctionsReturning a ValuePassing Values to FunctionsPassing ArgumentsSetting Default Parameter ValuesDealing with a Variable Number of ArgumentsRetrieving Values Using DictionariesHandling Variables in a FunctionLocal VariablesGlobal VariablesUsing Lists with FunctionsUsing Recursion with FunctionsSummaryQ&AWorkshopQuizAnswers
Hour 13. Working with Modules
Introducing Module ConceptsExploring Standard ModulesLearning About Python ModulesCreating Custom ModulesCreating or Gathering Functions That Go TogetherDetermining a Module NameCreating the Custom Module in a Test DirectoryTesting the Custom ModuleMoving a Module to a Production DirectoryChecking the Path and Modifying It, If NeededTesting the Production Custom ModuleSummaryQ&AWorkshopQuizAnswers
Hour 14. Exploring the World of Object-Oriented Programming
Understanding the Basics of Object-Oriented ProgrammingWhat Is OOP?Defining a ClassCreating an InstanceDefault Attribute ValuesDefining Class MethodsMutator MethodsAccessor MethodsAdding Helper Methods to Your CodeSharing Your Code with Class ModulesSummaryQ&AWorkshopQuizAnswers
Hour 15. Employing Inheritance
Learning About the Class ProblemUnderstanding Subclasses and InheritanceUsing Inheritance in PythonCreating a SubclassAdding a Subclass to an Object Module FileAdding Additional SubclassesPutting a Subclass in Its Own Object Module FileUsing Inheritance in Python ScriptsSummaryQ&AWorkshopQuizAnswers
Hour 16. Regular Expressions
What Are Regular Expressions?Definition of Regular ExpressionsTypes of Regular ExpressionsWorking with Regular Expressions in PythonRegular Expression FunctionsThe match() FunctionThe search() FunctionThe findall() and finditer() FunctionsCompiled Regular ExpressionsDefining Basic PatternsPlain TextSpecial CharactersAnchor CharactersThe Dot CharacterCharacter ClassesNegating Character ClassesUsing RangesThe AsteriskUsing Advanced Regular Expressions FeaturesThe Question MarkThe Plus SignUsing BracesThe Pipe SymbolGrouping ExpressionsWorking with Regular Expressions in Your Python ScriptsSummaryQ&AWorkshopQuizAnswers
Hour 17. Exception Handling
Understanding ExceptionsSyntactical Error ExceptionsRuntime Error ExceptionsHandling ExceptionsHandling Multiple ExceptionsCreating Multiple try except Statement BlocksHandling Generic ExceptionsUnderstanding try except Statement OptionsSummaryQ&AWorkshopQuizAnswers
Part IV: Graphical Programming
Hour 18. GUI Programming
Programming for a GUI EnvironmentThe Window InterfaceEvent-Driven ProgrammingExamining Python GUI PackagesUsing the tkinter PackageCreating a WindowAdding Widgets to the WindowDefining Event HandlersExploring the tkinter WidgetsUsing the Label WidgetAdding the Button WidgetWorking with the Checkbutton WidgetUsing the Entry WidgetAdding a Text WidgetUsing a Listbox WidgetWorking with the Menu WidgetSummaryQ&AWorkshopQuizAnswers
Hour 19. Game Programming
Understanding Game ProgrammingLearning About Game ToolsSetting Up the PyGame LibraryChecking for PyGameUsing PyGameLoading and Initializing PyGameSetting Up the Game ScreenPutting Text on the Game ScreenLearning More About PyGameStaying in the GameDrawing Images and ShapesPutting Sound into the GameDealing with PyGame ActionMoving Graphics Around the Game ScreenInteracting with Graphics on the Game ScreenSummaryQ&AWorkshopQuizAnswers
Part V: Business Programming
Hour 20. Using the Network
Finding the Python Network ModulesWorking with Email ServersEmail in the Linux WorldThe smtplib LibraryUsing the smtplib LibraryWorking with Web ServersRetrieving WebpagesParsing Webpage DataLinking Programs Using Socket ProgrammingWhat Is Socket Programming?The Python socket ModuleCreating the Server ProgramCreating the Client ProgramRunning the Client/Server DemoSummaryQ&AWorkshopQuizAnswers
Hour 21. Using Databases in Your Programming
Working with the MySQL DatabaseInstalling MySQLSetting Up the MySQL EnvironmentInstalling the Python MySQL ModuleCreating Your Python ScriptsUsing the PostgreSQL DatabaseInstalling PostgreSQLSetting Up the PostgreSQL EnvironmentInstalling the Python PostgreSQL ModuleCoding with psycopg2SummaryQ&AWorkshopQuizAnswers
Hour 22. Web Programming
Running a Web Server on the PiInstalling the Apache Web ServerServing HTML FilesProgramming with the Common Gateway InterfaceWhat Is CGI?Running Python ProgramsExpanding Your Python WebpagesFormatting OutputWorking with Dynamic WebpagesDebugging Python ProgramsProcessing FormsCreating Web FormsThe cgi ModuleSummaryQ&AWorkshopQuizAnswers
Part VI: Raspberry Pi Python Projects
Hour 23. Creating Basic Pi/Python Projects
Thinking About Basic Pi/Python ProjectsDisplaying HD Images via PythonUnderstanding High DefinitionCreating the Image Presentation ScriptSetting Up the Presentation ScreenFinding the ImagesStoring Photos on a Removable DriveScaling the PhotosCentering the PhotosFraming the PhotosImproving the Presentation SpeedPotential Script ModificationsPlaying MusicCreating a Basic Music ScriptStoring Your Music on a Removable DiskUsing a Music PlaylistControlling the PlaybackMaking the Play List RandomCreating a Special PresentationSummaryQ&AWorkshopQuizAnswers
Hour 24. Working with Advanced Pi/Python Projects
Exploring the GPIO InterfaceWhat Is the GPIO Interface?The GPIO Pin LayoutConnecting to the GPIOUsing the RPi.GPIO ModuleInstalling RPi.GPIOStartup MethodsControlling GPIO OutputSetting Up the Hardware to View the GPIO OutputTesting the GPIO OutputBlinking the LEDCreating a Fancy BlinkerDetecting GPIO InputSetting Up the Hardware for Detecting InputWorking with Input SignalsInput PollingInput EventsSummaryQ&AWorkshopQuizAnswers
Appendixes
Appendix A. Loading the Raspbian Operating System onto an SD Card
Downloading NOOBSVerifying NOOBS ChecksumChecking a Checksum on LinuxChecking a Checksum on WindowsChecking a Checksum on OS XUnpacking the NOOBS Zip FileUnpacking a Zip File on LinuxUnpacking a Zip File on WindowsUnpacking a Zip File on OS XFormatting the MicroSD CardFormatting a MicroSD Card on LinuxFormatting a MicroSD Card on WindowsFormatting a MicroSD Card on OS XCopying NOOBS to a MicroSD Card
Appendix B. Raspberry Pi Models Synopsis
Raspberry Pi 2 Model BRaspberry Pi 1 Model B+Raspberry Pi 1 Model A+Older Raspberry Pi Models
Index
Code Snippets

Overview

Python Programming for Raspberry Pi®

In just 24 sessions of one hour or less, Sams Teach Yourself Python Programming for Raspberry Pi in 24 Hours teaches you Python programming on Raspberry Pi, so you can start creating awesome projects for home automation, home theater, gaming, and more. Using this book’s straight-forward, step-by-step approach, you’ll move from the absolute basics all the way through network and web connections, multimedia, and even connecting with electronic circuits for sensing and robotics. Every lesson and case study application builds on what you’ve already learned, giving you a rock-solid foundation for real-world success!

Step-by-step instructions carefully walk you through the most common Raspberry Pi Python programming tasks.

Quizzes at the end of each chapter help you test your knowledge.

By the Way notes present interesting information related to the discussion.

Did You Know? tips offer advice or show you easier ways to perform tasks.

Watch Out! cautions alert you to possible problems and give you advice on how to avoid them.

Richard Blum has administered systems and networks for more than 25 years. He has published numerous Linux and open source books, and is an online instructor for web programming and Linux courses used by colleges across the United States. His books include Ubuntu Linux Secrets; Linux for Dummies, Ninth Edition; PostgreSQL 8 for Windows; and Professional Linux Programming.

Christine Bresnahan began working as a systems administrator more than 25 years ago. Now an Adjunct Professor at Ivy Tech Community College, she teaches Python programming, Linux administration and computer security. She is coauthor of The Linux Bible, Eighth Edition. With Blum, she also coauthored Linux Command Line & Shell Scripting Bible, Second Edition.

Get your Raspberry Pi and choose the right low-cost peripherals

Set up Raspian Linux and the Python programming environment

Learn Python basics, including arithmetic and structured commands

Master Python 3 lists, tuples, diction-aries, sets, strings, files, and modules

Reuse the same Python code in multiple locations with functions

Manipulate string data efficiently with regular expressions

Practice simple object-oriented programming techniques

Use exception handling to make your code more reliable

Program modern graphical user interfaces with Raspberry Pi and OpenGL

Create Raspberry Pi games with the PyGame library

Learn network, web, and database techniques you can also use in business software

Write Python scripts that send email

Interact with other devices through Raspberry Pi’s GPIO interface

Walk through example Raspberry Pi projects that inspire you to do even more

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Register your book at informit.com/title/9780672337642 for access to all code examples from the book, as well as update and corrections as they become available.

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