欢迎光临
我们一直在努力

用Python实现换行符转换的脚本的教程

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

复制代码 代码如下:

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。

 #!/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 

赞(0) 打赏
未经允许不得转载:三九么 » 用Python实现换行符转换的脚本的教程
分享到: 更多 (0)

评论 抢沙发

  • 昵称 (必填)
  • 邮箱 (必填)
  • 网址

觉得文章有用就打赏一下文章作者

支付宝扫一扫打赏

微信扫一扫打赏