recursive.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

mydict = {"root": {"dir1": {"subdir1": "foo"},
                   "dir2": {"subdir2": "bar",
                            "subdir3": {"subdir4": {"subdir5": "baz",
                                                    "subdir6": "foo_again"}}}}}


def get_contents(directories):
    results = list()
    for k, v in directories.iteritems():
        if type(v) == dict:
            v = get_contents(v)
            results.extend(v)
        else:
            results.append(v)
    return results

print get_contents(mydict)