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Introduction

Python Language Rules

Lint Imports Packages Exceptions Global Variables Nested/Local/Inner Classes and Functions List Comprehensions Default Iterators and Operators Generators Lambda Functions Conditional Expressions Default Argument Values Properties True/False Evaluations Deprecated Language Features Lexical Scoping Function and Method Decorators Threading Power Features

Python Style Rules

Semicolons Line Length Parentheses Indentation Blank Lines Whitespace Shebang Line Comments Classes Strings Files and Sockets TODO Comments Imports Formatting Statements Access Control Naming Main

Django Style Rules

Models Views Forms Urls

Main

正常情况下，作为脚本的文件也是可以导入的，那么单纯的导入不应该有执行脚本的效果。 主要功能应该都在main()函数中。

def main():
    ...

if __name__ == '__main__':
    main()

当作为模块被导入时，所有的代码都会被加载。 注意，不要调用函数、创建对象或其他操作，这些操作在导入时不应该被执行。

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