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《Learn Python The Hard Way》是Zed A. Shaw编著的一本Python编程入门书籍，尤其适合初学者。这本书的第二版（2nd Edition）以PDF格式提供，为读者提供了便捷的电子阅读体验。以下是该书可能涉及的一些核心知识点： 1. **Python基础**：本书从最基础的Python语法开始讲解，包括变量、数据类型（如整型、浮点型、字符串、列表、元组、字典和集合）、运算符以及控制流（如条件语句和循环结构）。 2. **函数与模块**：介绍如何创建和使用函数，理解参数传递，以及如何组织代码到模块中，以便于重用和管理。 3. **面向对象编程**：讲解Python的面向对象特性，包括类、对象的创建，封装、继承和多态等概念。 4. **异常处理**：学习如何处理程序运行时可能出现的错误，通过try/except语句捕获并处理异常。 5. **文件操作**：学习如何读写文件，包括文本文件和二进制文件，以及文件的打开、关闭和遍历。 6. **标准库和第三方库**：介绍Python标准库中的常用模块，如os、sys、math等，并引导读者了解如何使用pip安装和使用第三方库。 7. **调试和测试**：教授如何使用断点、print语句以及调试器进行程序调试，同时讲解单元测试和集成测试的基本概念。 8. **正则表达式**：学习使用Python的re模块来处理和匹配文本，进行数据验证或提取。 9. **Web开发基础**：简要介绍如何使用Python进行简单的Web开发，例如通过Flask或Django框架创建基本的HTTP服务器和动态网页。 10. **数据库交互**：介绍如何使用Python连接和操作关系型数据库，如SQLite，包括SQL语言的基础知识。 11. **项目实践**：书中包含多个实际编程项目，让读者在实践中巩固所学知识，例如编写命令行脚本、爬虫项目等。通过这本书的学习，读者将掌握Python编程的基本技能，能够独立编写和理解Python程序，为进一步深入学习Python的高级特性和应用打下坚实基础。PDF格式的电子版使得读者可以随时随地查阅和学习，方便快捷。

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Learn

Learn Python

Python

Python The

The

The Hard

Hard

Hard Way,

Way,

Way, 2nd

2nd

2nd Edition

Edition

This is the HTML preview of

Learn Python The Hard Way, 2nd Edition

It is a work in

progress and will most likely have some errors as I work on the full release of the

2nd Edition.

Learn

Learn Python

Python

Python The

The

The Hard

Hard

Hard Way,

Way,

Way, 2nd

2nd

2nd Edition

Edition

................................................................... 1

The Hard Way Is Easier .................................................................................................. 4

Exercise 0: The Setup .................................................................................................... 9

xercise 1: A Good First Program ................................................................................ 18

Exercise 2: Comments And Pound Characters .......................................................... 21

Exercise 3: Numbers And Math

.................................................................................. 23

Exercise 4: Variables And Names ............................................................................... 26

Exercise 5: More Variables And Printing ................................................................... 29

Exercise 6: Strings And Text ...................................................................................... 31

Exercise 7: More Printing ............................................................................................ 34

Exercise 8: Printing, Printing

...................................................................................... 36

Exercise 9: Printing, Printing, Printing ....................................................................... 37

Exercise 10: What Was That? ...................................................................................... 38

Exercise 11: Asking Questions ................................................................................... 41

Exercise 12: Prompting People ................................................................................... 43

Exercise 13: Parameters, Unpacking, Variables

........................................................ 45

Exercise 14: Prompting And Passing ......................................................................... 49

Exercise 15: Reading Files .......................................................................................... 51

Exercise 16: Reading And Writing Files ..................................................................... 55

Exercise 17: More Files ............................................................................................... 58

Exercise 18: Names, Variables, Code, Functions

...................................................... 61

Exercise 19: Functions And Variables ........................................................................ 66

Exercise 20: Functions And Files ............................................................................... 69

Exercise 21: Functions Can Return Something ......................................................... 72

Exercise 22: What Do You Know So Far? ................................................................... 75

Exercise 23: Read Some Code

.................................................................................... 77

Exercise 24: More Practice .......................................................................................... 79

Exercise 25: Even More Practice ................................................................................. 82

Exercise 26: Congratulations, Take A Test! .............................................................. 87

Exercise 27: Memorizing Logic .................................................................................. 89

Exercise 28: Boolean Practice

..................................................................................... 93

Exercise 29: What If ..................................................................................................... 97

Exercise 30: Else And If ............................................................................................... 99

Exercise 31: Making Decisions ................................................................................. 102

Exercise 32: Loops And Lists .................................................................................... 106

Exercise 33: While Loops

........................................................................................... 110

Exercise 34: Accessing Elements Of Lists ................................................................ 113

Exercise 35: Branches and Functions ....................................................................... 117

Exercise 36: Designing and Debugging ................................................................... 120

Exercise 37: Symbol Review ...................................................................................... 123

Exercise 38: Reading Code ....................................................................................... 127

Exercise 39: Doing Things To Lists .......................................................................... 129

Exercise 40: Dictionaries, Oh Lovely Dictionaries

................................................... 134

Exercise 41: Gothons From Planet Percal #25 ........................................................ 138

Exercise 42: Gothons Are Getting Classy ................................................................ 149

Exercise 43: You Make A Game ................................................................................ 159

Exercise 44: Evaluating Your Game .......................................................................... 161

Exercise 45: Is-A, Has-A, Objects, and Classes

..................................................... 166

Exercise 46: A Project Skeleton ................................................................................ 173

Exercise 47: Automated Testing .............................................................................. 179

Exercise 48: Advanced User Input ............................................................................ 184

Exercise 49: Making Sentences ................................................................................ 191

Exercise 50: Your First Website

................................................................................ 197

Exercise 51: Getting Input From A Browser ............................................................ 206

Exercise 52: The Start Of Your Web Game .............................................................. 223

Next Steps .................................................................................................................. 237

Advice From An Old Programmer ............................................................................. 239

The

The Hard

Hard

Hard Way

Way

Way Is

Is Easier

Easier

This simple book is meant to get you started in programming. The title says it's

the hard way to learn to write code; but it's actually not. It's only the "hard" way

because it's the way people

used

to teach things. With the help of this book, you

will do the incredibly simple things that all programmers need to do to learn a

language:

1. Go through each exercise.

2. Type in each sample

exactly

3. Make it run.

That's

it.

This will be

very

difficult at first, but stick with

it.

If you go through this

book, and do each exercise for one or two hours a night, you will have a good

foundation for moving onto another book. You might not really learn

"programming" from this book, but you will learn the foundation skills you need to

start learning the language.

This book's job is to teach you the three most essential skills that a beginning

programmer needs to know: Reading and Writing, Attention to Detail, Spotting

Differences.

Reading

Reading and

and

and Writing

Writing

It seems stupidly obvious, but, if you have a problem typing, you will have a

problem learning to code. Especially if you have a problem typing the fairly odd

characters in source code. Without this simple skill you will be unable to learn even

the most basic things about how software works.

Typing the code samples and getting them to run will help you learn the names of

the symbols, get familiar with typing them, and get you reading the language.

Attention

Attention to

to Detail

Detail

The one skill that separates bad programmers from good programmers is

attention to detail. In fact, it's what separates the good from the bad in any

profession. Without paying attention to the tiniest details of your work, you will

miss key elements of what you create. In programming, this is how you end up

with bugs and difficult-to-use systems.

By going through this book, and copying each example

exactly

you will be

training your brain to focus on the details of what you are doing, as you are doing

it.

Spotting

Spotting Differences

Differences

A very important skill -- that most programmers develop over time -- is the ability

to visually notice differences between things. An experienced programmer can

take two pieces of code that are slightly different and immediately start pointing

out the differences. Programmers have invented tools to make this even easier,

but we won't be using any of these. You first have to train your brain the hard way,

then you can use the tools.

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IMKIDD

2015-01-15

非常有参考价值
qq_25152961

2015-08-19

非常不错的资源，清晰，易懂，感谢楼主奉献。
kxds0000

2014-08-16

还不错，最新为第三版
julyfifteen

2014-12-01

挺好的，我还买了一本书来看，楼主真是无私奉献

js2854

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