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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

Parentheses

谨慎的使用括号。

  • 不要在条件判断语句（除了多行条件判断语句）使用括号
  • 不要在return语句中使用括号
  • 在元组周围使用括号

正确的写法

if foo:
    bar()
while x:
    x = bar()
if x and y:
    bar()
if not x:
    bar()
return foo
for (x, y) in dict.items():

不正确的写法

if (x):
    bar()
if not(x):
    bar()
return (foo)

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