Directories and subdirectories

[Thescottishmona]

I'm writing a program which is supposed to go deeper and deeper in a specific directory. If the elements of current directory are files, write down their names. else - go deeper in them and write out files from the deeper directories. I'm near solution, the problem is-i don't know how to tell Python to do:

If the directory is empty, pass it.

[bvdet]

Use os.walk to recursively access subdirectories and files under a directory. In the code below, the message "There are no files in directory %s\n" % (root) is displayed if the subdirectory is empty.

import os
 
dir_name = (os.path.join('D:/', 'SDS2_7.0', 'macro', 'Defaults'))
 
a = os.walk(dir_name)
 
for root, dir, file in a:
 
    print "Root directory: %s" % (root)
 
    if dir:
        print "Subdirectories under %s:" % (root)
        dirList = map(lambda x: '%s\n' % (x), dir)
        dirStr = "".join(dirList)
        print dirStr
    else:
        print "There are no subdirectories under directory %s\n" % (root)
 
    if file:
        print "Files in directory %s:" % (root)
        fileList = map(lambda x: '%s\n' % (os.path.join(root, x)), file)
        fileStr = "".join(fileList)
        print fileStr
    else:
        print "There are no files in directory %s\n" % (root)