add OrderedDict, that is especially useful to load JSON strings with keeping the order of items.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@39051 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/collections.py

+# -*- coding: utf-8 -*-
+##############################################################################
+#
+# Copyright (c) 2010 Nexedi SARL and Contributors. All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsibility of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# guarantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+import collections
+try:
+  from collections import OrderedDict
+except ImportError:
+  try:
+    from ordereddict import OrderedDict
+    collections.OrderedDict = OrderedDict
+  except ImportError:
+    OrderedDict = None
+
+if OrderedDict is not None and \
+    getattr(OrderedDict, '__allow_access_to_unprotected_subobjects__',
+            None) is None:
+  OrderedDict.__allow_access_to_unprotected_subobjects__ = 1