Python实现把回车符/r/n转换成/n

import osdef 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