/usr/share/pyshared/zope/app/generations/demo/__init__.py is in python-zope.app.generations 3.6.1-0ubuntu1.
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#
# Copyright (c) 2004 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Demo package for evolution scripts
The evolution scripts in this package are pretty dumb. The just call
the evolve function defined here with a generation number.
$Id: __init__.py 124134 2012-01-23 15:20:44Z menesis $
"""
__docformat__ = 'restructuredtext'
key = 'zope.app.generations.demo-generation'
def evolve(context, generation):
"""Demo that "evolves" a database.
All it does is write the generation to a database root item.
"""
root = context.connection.root()
root[key] = root.get(key, ()) + (generation, )
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