Get user groups.

        :param user:
        :return:

def _get_user_groups(self, user):
        '''
        Get user groups.

        :param user:
        :return:
        '''
        return [g.gr_name for g in grp.getgrall()
                if user in g.gr_mem] + [grp.getgrgid(pwd.getpwnam(user).pw_gid).gr_name]