python Autopep8——按PEP8風格自動排版Python代碼

python Autopep8——按PEP8風格自動排版Python代碼

Autopep8是一個将Python代碼自動排版為PEP8風格的小工具。它使用pep8工具來決定代碼中的哪部分需要被排版。Autopep8可以修複大部分pep8工具中報告的排版問題。

參考網址：

https://www.python.org/dev/peps/pep-0008/

https://pypi.python.org/pypi/autopep8/

（1）安裝步驟如下：

localhost:~ a6$ sudo pip install autopep8
Password:
The directory '/Users/a6/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/Users/a6/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting autopep8
Collecting pycodestyle>=2.3 (from autopep8)
  Downloading pycodestyle-2.3.1-py2.py3-none-any.whl (45kB)
    100% |████████████████████████████████| 51kB 324kB/s
Installing collected packages: pycodestyle, autopep8
Successfully installed autopep8-1.3.3 pycodestyle-2.3.1
localhost:~ a6$ sudo pip install autopep8
The directory '/Users/a6/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/Users/a6/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Requirement already satisfied: autopep8 in /Library/Python/2.7/site-packages
Requirement already satisfied: pycodestyle>=2.3 in /Library/Python/2.7/site-packages (from autopep8)
           

（2）示例代碼：

1）運作指令前代碼的排版 (儲存在test_autopep8.py)

import math, sys;

def example1():
    ####This is a long comment. This should be wrapped to fit within 72 characters.
    some_tuple=(   1,2, 3,'a'  );
    some_variable={'long':'Long code lines should be wrapped within 79 characters.',
    'other':[math.pi, 100,200,300,9876543210,'This is a long string that goes on'],
    'more':{'inner':'This whole logical line should be wrapped.',some_tuple:[1,
    20,300,40000,500000000,60000000000000000]}}
    return (some_tuple, some_variable)
def example2(): return {'has_key() is deprecated':True}.has_key({'f':2}.has_key(''));
class Example3(   object ):
    def __init__    ( self, bar ):
     #Comments should have a space after the hash.
     if bar : bar+=1;  bar=bar* bar   ; return bar
     else:
                    some_string = """
                       Indentation in multiline strings should not be touched.
Only actual code should be reindented.
"""
                    return (sys.path, some_string)
           

2）運作指令

bogon:AB a6$ autopep8 --in-place --aggressive --aggressive test_autopep8.py
           

3）運作指令後代碼的排版

import math
import sys


def example1():
    # This is a long comment. This should be wrapped to fit within 72
    # characters.
    some_tuple = (1, 2, 3, 'a')
    some_variable = {
        'long': 'Long code lines should be wrapped within 79 characters.',
        'other': [
            math.pi,
            100,
            200,
            300,
            9876543210,
            'This is a long string that goes on'],
        'more': {
            'inner': 'This whole logical line should be wrapped.',
            some_tuple: [
                1,
                20,
                300,
                40000,
                500000000,
                60000000000000000]}}
    return (some_tuple, some_variable)


def example2(): return ('' in {'f': 2}) in {'has_key() is deprecated': True};


class Example3(object):
    def __init__(self, bar):
        # Comments should have a space after the hash.
        if bar:
            bar += 1
            bar = bar * bar
            return bar
        else:
            some_string = """
                       Indentation in multiline strings should not be touched.
            Only actual code should be reindented.
            """
            return (sys.path, some_string)
           

4）參考網址：

https://github.com/hhatto/autopep8