python 递归遍历文件夹

#!/usr/bin/python

import os.path

def readXmls(folder):
#三个参数：分别返回1.父目录 2.所有文件夹名字（不含路径） 3.所有文件名字
for parent,dirnames,filenames in os.walk(folder):
for dirname in  dirnames:
print("parent is:" + parent)
print("dirname is" + dirname)
#readXmls(os.path.join(parent, dirname))这句不能有！！！
for filename in filenames:
print("parent is:" + parent)
print("filename is:" + filename)
print("the full name of the file is:" + os.path.join(parent,filename)) #输出文件路径信息

if __name__ == '__main__':
readXmls('xmlfiles')