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Python实现把回车符rn转换成n

WBOY
WBOYOriginal
2016-06-06 11:25:441389browse

最近在做cocos2d-x的简明配置,发现有的朋友的文本编辑器,自动将\r\n截断成\n,(在unix上换行使用\n,windows上,换行使用的是\r\n)于是,写了这个脚本,希望对一些朋友有所帮助,不用一行一行去改

import os

def replace(filePath, w2u):
  try:
    oldfile = open(filePath, "rb+")     #这里必须用b打开
    path, name = os.path.split(filePath)
    newfile = open(path + '$' + name, "ba+")
    
    old = b''
    new = b''
    if w2u == True:
      old = b'\r'
      new = b''
    else:
      old = b'\n'
      new = b'\r\n'

    data = b''
    while (True):
      data = oldfile.read(200)
      newData = data.replace(old, new)
      newfile.write(newData)
      if len(data) < 200:
        break
    newfile.close()
    oldfile.close()
    
    os.remove(filePath)
    os.rename(path + '$' + name, filePath)
  except IOError as e:
    print(e)
    
if __name__ == "__main__":
  print("请输入文件路径:")
  filePath = input()
  replace(filePath, False)  #这个改为True就可以实现\n变成\r\n

要注意的是,在python里,像\r\n这样的符号,如果是文本打开的话,是找不到\r\n的,而只能找到'\n',所以必须用b(二进制)模式打开。

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