[Python] Using os.walk() to recursively traverse directories in Python

I want to navigate from the root directory to all other directories within and print the same.

Here's my code:

#!/usr/bin/python

import os
import fnmatch

for root, dir, files in os.walk("."):
print root
print ""
for items in fnmatch.filter(files, "*"):
print "..." + items
print ""


And here's my O/P:

.

...Python_Notes
...pypy.py
...pypy.py.save
...classdemo.py
....goutputstream-J9ZUXW
...latest.py
...pack.py
...classdemo.pyc
...Python_Notes~
...module-demo.py
...filetype.py

./packagedemo

...classdemo.py
...__init__.pyc
...__init__.py
...classdemo.pyc


Above, . and ./packagedemo are directories.

However, I need to print the O/P in the following manner:

A
---a.txt
---b.txt
---B
------c.out


Above, A and B are directories and the rest are files.

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