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The Hard Way Is Easier
Reading And Writing
Attention To Detail
Spotting Differences
Do Not Copy-Paste
License
Exercise 0: The Setup
Mac OSX
Windows
Linux
Warnings For Beginners
Exercise 1: A Good First Program
What You Should See
Extra Credit
Exercise 2: Comments And Pound Characters
What You Should See
Extra Credit
Exercise 3: Numbers And Math
What You Should See
Extra Credit
Exercise 4: Variables And Names
What You Should See
Extra Credit
Exercise 5: More Variables And Printing
What You Should See
Extra Credit
Exercise 6: Strings And Text
What You Should See
Extra Credit
Exercise 7: More Printing
What You Should See
Extra Credit
Exercise 8: Printing, Printing
What You Should See
Extra Credit
Exercise 9: Printing, Printing, Printing
What You Should See
Extra Credit
Exercise 10: What Was That?
What You Should See
Extra Credit
Exercise 11: Asking Questions
What You Should See
Extra Credit
Exercise 12: Prompting People
What You Should See
Extra Credit
Exercise 13: Parameters, Unpacking, Variables
What You Should See
Extra Credit
Exercise 14: Prompting And Passing
What You Should See
Extra Credit
Exercise 15: Reading Files
What You Should See
Extra Credit
Exercise 16: Reading And Writing Files
What You Should See
Extra Credit
Exercise 17: More Files
What You Should See
Extra Credit
Exercise 18: Names, Variables, Code, Functions
What You Should See
Extra Credit
Exercise 19: Functions And Variables
What You Should See
Extra Credit
Exercise 20: Functions And Files
What You Should See
Extra Credit
Exercise 21: Functions Can Return
What You Should See
Extra Credit
Exercise 27: Memorizing Logic
The Truth Terms
The Truth Tables
Advice From An Old Programmer
Indices and tables
Learn Python The Hard Way Release 0.2 Zed A. Shaw May 02, 2010
CONTENTS The Hard Way Is Easier Reading And Writing . Attention To Detail . . Spotting Differences . Do Not Copy-Paste . License . . . . . . . . . . . . . . Exercise 0: The Setup . . . . . . . Mac OSX . . . Windows . Linux . . Warnings For Beginners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exercise 1: A Good First Program . . What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exercise 2: Comments And Pound Characters What You Should See . Extra Credit . . . . . . . . . . . . Exercise 3: Numbers And Math . . What You Should See . Extra Credit . . . . . . . . . . . . . . Exercise 4: Variables And Names . . What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exercise 5: More Variables And Printing . . What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . . . Exercise 6: Strings And Text . . What You Should See . Extra Credit . . . . . . Exercise 7: More Printing What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 3 3 4 4 5 5 6 6 7 9 9 10 11 11 11 13 14 14 15 15 16 17 17 18 19 20 20 21 21 21 i
Exercise 8: Printing, Printing . . What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . Exercise 9: Printing, Printing, Printing . . What You Should See . . Extra Credit . . . . . . . . . . . . . . . . . Exercise 10: What Was That? . . What You Should See . . Extra Credit . . . . . . . Exercise 11: Asking Questions . . What You Should See . . Extra Credit . . . . . . . . . . . Exercise 12: Prompting People . . . . What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exercise 13: Parameters, Unpacking, Variables What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . Exercise 14: Prompting And Passing . . What You Should See . Extra Credit . . . . . . . . . . . . . . . . Exercise 15: Reading Files What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exercise 16: Reading And Writing Files . . What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exercise 17: More Files What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exercise 18: Names, Variables, Code, Functions What You Should See . Extra Credit . . . . . . . . . . . . . . . . . . . . Exercise 19: Functions And Variables . . . . What You Should See . Extra Credit . . . . . . . . . . . . . . . . Exercise 20: Functions And Files . . What You Should See . Extra Credit . . . . . . . . . . . . . . Exercise 21: Functions Can Return . . What You Should See . . Extra Credit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii 23 23 23 25 25 25 27 27 28 29 29 30 31 31 31 33 33 34 35 35 36 37 38 38 39 40 40 41 41 42 43 44 44 47 47 48 49 50 50 51 52 52
Exercise 27: Memorizing Logic . . The Truth Terms . The Truth Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Advice From An Old Programmer Indices and tables 53 53 54 55 57 iii
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Contents: Learn Python The Hard Way, Release 0.2 CONTENTS 1
Learn Python The Hard Way, Release 0.2 2 CONTENTS
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