delete the files in subfolders

import os
from os import walk
import shutil

mypath='./13/'

for (dirpath, dirnames, filenames) in walk(mypath):
    for dir in dirnames:
       for (dirpath1, dirnames1, filenames1) in walk(mypath+dir):
           for i in filenames1:
               print(mypath+dir+'/'+i)
               os.remove(mypath+dir+'/'+i)

http://blog.csdn.net/liuchunming033/article/details/39400931