Python 官方简明教程

（本段译文尚未校对）

Python是一个简单易学、功能强大的编程语言。它拥有高效的数据构造和简洁便利的面向对象的设计程序。Python的优美语法和动态输入与解释器自然地融合在一起，使之成为了一个能在大多数平台和众多领域中编写脚本和进行快速应用程序开发的理想语言。

在Python的官方网站 http://www.python.org/ 里，为所有主要的平台提供Pythn的解释器和丰富的标准库，而且都开放免费的源代码或者二进制代码，可以自由分发。这个网站也涵括发布许多第三方Python模块、程序和工具、附加文档等。

Python的解释器很容易在C或C++（或其他从C语言调用）扩展新功能和数据类型。Python也很适合于在定制应用中作为一个可扩展的编程语言。

本教程向读者非正式地介绍Python语言和系统的基本概念和功能。本教程将帮助您灵巧地掌握Python解释器以及获得实践经验，而且所有的例子都是独立的，所以本教程可以方便地离线阅读。

关于标准对像和模块的说明，请参考《Python标准库》。《Python语言参考》对编程语言给出了更正式的定义。需要编写C或C++扩展的朋友请参考《扩展和嵌入式Python解释器和Python/C API接口参考手册》。这些都是有一定深度的Python参考书籍。

本教程不会全面详尽地介绍Python的每一个单一功能，甚或每一个常用功能。取而代之的是，本教程介绍Python中一些最值得注意的功能，向您推荐Python语言的特色和样式。阅读本教程之后，您将可以读懂和编写Python模块和程序，在此基础上，您将可以在《Python标准库》中继续学习更多的关于各个Python库模块的说明。

词汇表也是值得阅读的。

目录

（已翻译的中文条目带有本站Wiki链接页面） 1. Whetting Your Appetite 2. Using the Python Interpreter 2.1. Invoking the Interpreter 2.1.1. Argument Passing 2.1.2. Interactive Mode 2.2. The Interpreter and Its Environment 2.2.1. Error Handling 2.2.2. Executable Python Scripts 2.2.3. Source Code Encoding 2.2.4. The Interactive Startup File 3. 非正式地介绍Python（译文尚未校对） 3.1. Using Python as a Calculator 3.1.1. Numbers 3.1.2. Strings 3.1.3. About Unicode 3.1.4. Lists 3.2. First Steps Towards Programming 4. More Control Flow Tools 4.1. if Statements 4.2. for Statements 4.3. The range() Function 4.4. break and continue Statements, and else Clauses on Loops 4.5. pass Statements 4.6. Defining Functions 4.7. More on Defining Functions 4.7.1. Default Argument Values 4.7.2. Keyword Arguments 4.7.3. Arbitrary Argument Lists 4.7.4. Unpacking Argument Lists 4.7.5. Lambda Forms 4.7.6. Documentation Strings 4.8. Intermezzo: Coding Style 5. Data Structures 5.1. More on Lists 5.1.1. Using Lists as Stacks 5.1.2. Using Lists as Queues 5.1.3. List Comprehensions 5.1.4. Nested List Comprehensions 5.2. The del statement 5.3. Tuples and Sequences 5.4. Sets 5.5. Dictionaries 5.6. Looping Techniques 5.7. More on Conditions 5.8. Comparing Sequences and Other Types 6. Modules 6.1. More on Modules 6.1.1. Executing modules as scripts 6.1.2. The Module Search Path 6.1.3. “Compiled” Python files 6.2. Standard Modules 6.3. The dir() Function 6.4. Packages 6.4.1. Importing * From a Package 6.4.2. Intra-package References 6.4.3. Packages in Multiple Directories 7. Input and Output 7.1. Fancier Output Formatting 7.1.1. Old string formatting 7.2. Reading and Writing Files 7.2.1. Methods of File Objects 7.2.2. The pickle Module 8. Errors and Exceptions 8.1. Syntax Errors 8.2. Exceptions 8.3. Handling Exceptions 8.4. Raising Exceptions 8.5. User-defined Exceptions 8.6. Defining Clean-up Actions 8.7. Predefined Clean-up Actions 9. Classes 9.1. A Word About Names and Objects 9.2. Python Scopes and Namespaces 9.2.1. Scopes and Namespaces Example 9.3. A First Look at Classes 9.3.1. Class Definition Syntax 9.3.2. Class Objects 9.3.3. Instance Objects 9.3.4. Method Objects 9.4. Random Remarks 9.5. Inheritance 9.5.1. Multiple Inheritance 9.6. Private Variables 9.7. Odds and Ends 9.8. Exceptions Are Classes Too 9.9. Iterators 9.10. Generators 9.11. Generator Expressions 10. Brief Tour of the Standard Library 10.1. Operating System Interface 10.2. File Wildcards 10.3. Command Line Arguments 10.4. Error Output Redirection and Program Termination 10.5. String Pattern Matching 10.6. Mathematics 10.7. Internet Access 10.8. Dates and Times 10.9. Data Compression 10.10. Performance Measurement 10.11. Quality Control 10.12. Batteries Included 11. Brief Tour of the Standard Library – Part II 11.1. Output Formatting 11.2. Templating 11.3. Working with Binary Data Record Layouts 11.4. Multi-threading 11.5. Logging 11.6. Weak References 11.7. Tools for Working with Lists 11.8. Decimal Floating Point Arithmetic 12. What Now? 13. Interactive Input Editing and History Substitution 13.1. Line Editing 13.2. History Substitution 13.3. Key Bindings 13.4. Alternatives to the Interactive Interpreter 14. Floating Point Arithmetic: Issues and Limitations 14.1. Representation Error

（对照Python官方网站英文目录页面） 1. Whetting Your Appetite 2. Using the Python Interpreter 2.1. Invoking the Interpreter 2.1.1. Argument Passing 2.1.2. Interactive Mode 2.2. The Interpreter and Its Environment 2.2.1. Error Handling 2.2.2. Executable Python Scripts 2.2.3. Source Code Encoding 2.2.4. The Interactive Startup File 3. An Informal Introduction to Python 3.1. Using Python as a Calculator 3.1.1. Numbers 3.1.2. Strings 3.1.3. About Unicode 3.1.4. Lists 3.2. First Steps Towards Programming 4. More Control Flow Tools 4.1. if Statements 4.2. for Statements 4.3. The range() Function 4.4. break and continue Statements, and else Clauses on Loops 4.5. pass Statements 4.6. Defining Functions 4.7. More on Defining Functions 4.7.1. Default Argument Values 4.7.2. Keyword Arguments 4.7.3. Arbitrary Argument Lists 4.7.4. Unpacking Argument Lists 4.7.5. Lambda Forms 4.7.6. Documentation Strings 4.8. Intermezzo: Coding Style 5. Data Structures 5.1. More on Lists 5.1.1. Using Lists as Stacks 5.1.2. Using Lists as Queues 5.1.3. List Comprehensions 5.1.4. Nested List Comprehensions 5.2. The del statement 5.3. Tuples and Sequences 5.4. Sets 5.5. Dictionaries 5.6. Looping Techniques 5.7. More on Conditions 5.8. Comparing Sequences and Other Types 6. Modules 6.1. More on Modules 6.1.1. Executing modules as scripts 6.1.2. The Module Search Path 6.1.3. “Compiled” Python files 6.2. Standard Modules 6.3. The dir() Function 6.4. Packages 6.4.1. Importing * From a Package 6.4.2. Intra-package References 6.4.3. Packages in Multiple Directories 7. Input and Output 7.1. Fancier Output Formatting 7.1.1. Old string formatting 7.2. Reading and Writing Files 7.2.1. Methods of File Objects 7.2.2. The pickle Module 8. Errors and Exceptions 8.1. Syntax Errors 8.2. Exceptions 8.3. Handling Exceptions 8.4. Raising Exceptions 8.5. User-defined Exceptions 8.6. Defining Clean-up Actions 8.7. Predefined Clean-up Actions 9. Classes 9.1. A Word About Names and Objects 9.2. Python Scopes and Namespaces 9.2.1. Scopes and Namespaces Example 9.3. A First Look at Classes 9.3.1. Class Definition Syntax 9.3.2. Class Objects 9.3.3. Instance Objects 9.3.4. Method Objects 9.4. Random Remarks 9.5. Inheritance 9.5.1. Multiple Inheritance 9.6. Private Variables 9.7. Odds and Ends 9.8. Exceptions Are Classes Too 9.9. Iterators 9.10. Generators 9.11. Generator Expressions 10. Brief Tour of the Standard Library 10.1. Operating System Interface 10.2. File Wildcards 10.3. Command Line Arguments 10.4. Error Output Redirection and Program Termination 10.5. String Pattern Matching 10.6. Mathematics 10.7. Internet Access 10.8. Dates and Times 10.9. Data Compression 10.10. Performance Measurement 10.11. Quality Control 10.12. Batteries Included 11. Brief Tour of the Standard Library – Part II 11.1. Output Formatting 11.2. Templating 11.3. Working with Binary Data Record Layouts 11.4. Multi-threading 11.5. Logging 11.6. Weak References 11.7. Tools for Working with Lists 11.8. Decimal Floating Point Arithmetic 12. What Now? 13. Interactive Input Editing and History Substitution 13.1. Line Editing 13.2. History Substitution 13.3. Key Bindings 13.4. Alternatives to the Interactive Interpreter 14. Floating Point Arithmetic: Issues and Limitations 14.1. Representation Error

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