Tab completion in Python's raw_input()

i know i can do this to get the effect of tab completion in python sure.

import readline
COMMANDS = ['extra', 'extension', 'stuff', 'errors',
            'email', 'foobar', 'foo']

def complete(text, state):
    for cmd in COMMANDS:
        if cmd.startswith(text):
            if not state:
                return cmd
            else:
                state -= 1

readline.parse_and_bind("tab: complete")
readline.set_completer(complete)
raw_input('Enter section name: ')

I am now interested in doing tab completion with directories. (/home/user/doc >tab)

How would i go about doing such a task?