很简单的一个东西，在'n'、'rn'、'r'3中换行符之间进行转换。

 

用法

 

usage: eol_convert.py [-h] [-r] [-m {u,p,w,m,d}] [-k] [-f]

filename [filename ...]

 

Convert Line Ending

 

positional arguments:

filename        file names

 

optional arguments:

-h, --help      show this help message and exit

-r              walk through directory

-m {u,p,w,m,d}  mode of the line ending

-k              keep output file date

-f              force conversion of binary files

源码

这只能算是argparse模块和os模块的utime()、stat()、walk()的一个简单的练习。可以用，但还相当不完善。

 

view plain

#!/usr/bin/env python 

#2009-2011 dbzhang800 

import os 

import re 

import os.path 

 

def convert_line_endings(temp, mode): 

if mode in ['u', 'p']: #unix, posix 

temp = temp.replace('rn', 'n') 

temp = temp.replace('r', 'n') 

elif mode == 'm':      #mac (before Mac OS 9) 

temp = temp.replace('rn', 'r') 

temp = temp.replace('n', 'r') 

elif mode == 'w':      #windows 

temp = re.sub("r(?!n)|(?<!r)n", "rn", temp) 

return temp 

 

def convert_file(filename, args): 

statinfo = None 

with file(filename, 'rb+') as f: 

data = f.read() 

if '' in data and not args.force:  #skip binary  file... ? 

print '%s is a binary file?, skip...' % filename 

return 

newdata = convert_line_endings(data, args.mode) 

if (data != newdata): 

statinfo = os.stat(filename) if args.keepdate else None 

f.seek(0) 

f.write(newdata) 

f.truncate() 

if statinfo: 

os.utime(filename, (statinfo.st_atime, statinfo.st_mtime)) 

print filename 

 

def walk_dir(d, args): 

for root, dirs, files in os.walk(d): 

for name in files: 

convert_file(os.path.join(root, name), args) 

 

if __name__ == '__main__': 

import argparse 

import sys 

parser = argparse.ArgumentParser(description='Convert Line Ending') 

parser.add_argument('filename', nargs='+', help='file names') 

parser.add_argument('-r', dest='recursive', action='store_true', 

help='walk through directory') 

parser.add_argument('-m', dest='mode', default='d', choices='upwmd', 

help='mode of the line ending') 

parser.add_argument('-k', dest='keepdate', action='store_true', 

help='keep output file date') 

parser.add_argument('-f', dest='force', action='store_true', 

help='force conversion of binary files') 

args = parser.parse_args() 

if args.mode == 'd': 

args.mode = 'w' if sys.platform == 'win32' else 'p' 

 

for filename in args.filename: 

if os.path.isdir(filename): 

if args.recursive: 

walk_dir(filename, args) 

else: 

print '%s is a directory, skip...' % filename 

elif os.path.exists(filename): 

convert_file(filename, args) 

else: 

print '%s does not exist' % filename   

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