python使用os模块的os.walk遍历文件夹

#!/usr/bin/python
#site: www.jbxue.com
#-*- coding:utf-8 -*-
import os
if __name__ == '__main__':
try:
'''traval and list all files and all dirs'''
for root, dirs, files in os.walk('D:' + os.sep + 'Python27'):
print '-------------------directory < ' + root + ' > --------------------------'
for d in dirs:
print d
for f in files:
print f
except OSError, e:
print os.strerror(e.errno)