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 --------------------------'
for d in dirs:
print d
for f in files:
print f
except OSError, e:
print os.strerror(e.errno)
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