From 17723a6b6dc047e6341bcfcda29120580f352b46 Mon Sep 17 00:00:00 2001 From: Zhongyue Luo Date: Mon, 4 Jun 2012 13:30:35 +0800 Subject: Keystone should use openstack.common.importutils Implements blueprint use-common-importutils Change-Id: I597f71dc72aa3b87a454c4a23ca1b5328e222f76 --- keystone/openstack/common/importutils.py | 44 ++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 keystone/openstack/common/importutils.py (limited to 'keystone/openstack') diff --git a/keystone/openstack/common/importutils.py b/keystone/openstack/common/importutils.py new file mode 100644 index 00000000..7654af5b --- /dev/null +++ b/keystone/openstack/common/importutils.py @@ -0,0 +1,44 @@ +# vim: tabstop=4 shiftwidth=4 softtabstop=4 + +# Copyright 2011 OpenStack LLC. +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + +""" +Import related utilities and helper functions. +""" + +import sys + + +def import_class(import_str): + """Returns a class from a string including module and class""" + mod_str, _sep, class_str = import_str.rpartition('.') + try: + __import__(mod_str) + return getattr(sys.modules[mod_str], class_str) + except (ImportError, ValueError, AttributeError), exc: + raise ImportError('Class %s cannot be found (%s)' % + (class_str, str(exc))) + + +def import_object(import_str, *args, **kwargs): + """Import a class and return an instance of it.""" + return import_class(import_str)(*args, **kwargs) + + +def import_module(import_str): + """Import a module.""" + __import__(import_str) + return sys.modules[import_str] -- cgit