Autopep8

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Introduction

Autopep8是一个将Python代码自动排版为PEP8风格的小工具。
它使用pep8工具来决定代码中的哪部分需要被排版。
Autopep8可以修复大部分pep8工具中报告的排版问题。

Installation

install autopep8 by pip:

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$ sudo -H pip install autopep8
[sudo] password for yarving:
Collecting autopep8
  Downloading autopep8-1.2.4-py2.py3-none-any.whl (41kB)
    100% |████████████████████████████████| 51kB 83kB/s
Collecting pep8>=1.5.7 (from autopep8)
  Downloading pep8-1.7.0-py2.py3-none-any.whl (41kB)
    100% |████████████████████████████████| 51kB 29kB/s
Installing collected packages: pep8, autopep8
Successfully installed autopep8-1.2.4 pep8-1.7.0

Basic Usage

  1. preparing a python file with bad format

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    #!/usr/bin/env python
    # encoding: utf-8
    s1='查看系统'
    s2=u'内所有安装'
    print s1
    print s2
    print s1.decode('utf-8')+s2
    #print s1 + s2 # this line will raise error

  2. use pep8 to check this file

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    pep8 test.py
    test.py:3:3: E225 missing whitespace around operator
    test.py:4:3: E225 missing whitespace around operator
    test.py:8:1: E265 block comment should start with '# '

  3. use autopep8 to fix the file
    Overwrite the original file by commmand: autopep8 --in-place test.py
    Then found the file is fixed as below:

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    #!/usr/bin/env python
    # encoding: utf-8
    s1 = '查看系统'
    s2 = u'内所有安装'
    print s1
    print s2
    print s1.decode('utf-8') + s2
    # print s1 + s2 # this line will raise error
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