Python 读取目录，office文件分类

import os
dict_suffix   ={'doc':[],'docx':[],
          'xls':[],'xlsx':[],
          'ppt':[],'pptx':[]}

def lsdir(path):
    for dirpath,dirnames,filenames in os.walk(path):
        for filename in filenames:  
            suffix=filename[filename.rfind(r'.')+1:len(filename)].lower() 
            if suffix in dict_suffix:
                dict_suffix[suffix].append(os.path.join(dirpath,filename))
    return  dict_suffix
      
  
        

if __name__ == '__main__': 
   # pl = r'D:\workspace\数据字典'
    old_pl=input('请输入路径:')
    if old_pl[-1] =='\/':
        old_pl=old_pl[0:len(old_pl)-1]
    pl=old_pl.replace('\/', '\/\/')
    dic=lsdir(pl)
    for i in dic:
        if len(dic[i])>0 :
            print('文件类型:',i)
            [print(s) for s in dic[i]]