Listing All Passwords Stored in Gnome Keyring http://blog.schmichael.com/2008/10/30/listing-all-passwords-stored-in-gnome-keyring/

dump-passwords.py

#!/usr/bin/env python
 
import pygtk
pygtk.require('2.0')
import gtk # sets app name
import gnomekeyring
 
def hack():
    for keyring in gnomekeyring.list_keyring_names_sync():
        for id in gnomekeyring.list_item_ids_sync(keyring):
            item = gnomekeyring.item_get_info_sync(keyring, id)
            print '[%s] %s = %s' % (
                    keyring, item.get_display_name(), item.get_secret())
        else:
            if len(gnomekeyring.list_item_ids_sync(keyring)) == 0:
                print '[%s] --empty--' % keyring
 
if __name__ == '__main__':
    hack()

example-output.txt

[default] Local password for user root = *******
[login] michael.schurter@Work = *******
[login] Google Account = *******
[login] Passphrase for wireless network 2WIRE939 = *******
[login] Unlock password for default keyring = *******
[login] schmichael@twitter.com = *******
[session] --empty--

Python3 example?