Python interface to the POSIX getent family of commands (getpwent, getgrent, getnetent, etc.)
Here a few examples.
Load the interface:
>>> import getent
Doing a passwd lookup:
>>> print dict(getent.passwd('root'))
{'dir': '/root',
'gecos': 'root',
'gid': 0,
'name': 'root',
'password': 'x',
'shell': '/bin/bash',
'uid': 0}
Doing a group lookup:
>>> print dict(getent.group('root'))
{'gid': 0, 'members': [], 'name': 'root', 'password': 'x'}