使用python实现unix2dos和dos2unix命令的例子

unix2dos.py {unix2dos|dos2unix} {dirname|filename}

#! /usr/bin/env python# coding=utf-8 import osimport sys try:  input = raw_inputexcept:  pass def usage():  print('Usage:')  print('/t %s' % ('unix2dos.py {unix2dos|dos2unix} {dirname|filename}')) def err_exit(msg):  if msg: print('%s' % msg)  usage()  sys.exit(0) def getfiles(root):  for dirpath, dirnames, filenames in os.walk(root):    for filename in filenames:      yield os.path.join(dirpath, filename) def format_file(file, toformat='unix2dos'):  print('Formatting %s:/t%s' % (toformat, file))  if not os.path.isfile(file):    print('ERROR: %s invalid normal file' % file)    return  if toformat == 'unix2dos':    line_sep = '/r/n'  else:    line_sep = '/n'  with open(file, 'r') as fd:    tmpfile = open(file+toformat, 'w+b')    for line in fd:      line = line.replace('/r', '')      line = line.replace('/n', '')      tmpfile.write(line+line_sep)    tmpfile.close()    os.rename(file+toformat, file) def uni_format_proc(filename, toformat):  if not toformat or toformat not in ['unix2dos', 'dos2unix']:    err_exit('ERROR: %s: Invalid format param' % (toformat))  if not filename or not os.path.exists(filename):    err_exit('ERROR: %s: No such file or directory' % (filename))  if os.path.isfile(filename):    format_file(filename, toformat)    return  if os.path.isdir(filename):    for file in getfiles(filename):      uni_format_proc(file, toformat) if __name__ == '__main__':  if len(sys.argv) != 3:    err_exit('ERROR: Invalid arguments')  uni_format_proc(filename=sys.argv[2], toformat=sys.argv[1])