/usr/lib/python3/dist-packages/aeidon/delegate.py is in python3-aeidon 0.24.3-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | # -*- coding: utf-8 -*-
# Copyright (C) 2005-2007,2009 Osmo Salomaa
#
# This file is part of Gaupol.
#
# Gaupol 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 3 of the License, or (at your option) any later
# version.
#
# Gaupol 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
# Gaupol. If not, see <http://www.gnu.org/licenses/>.
"""Base class for objects that dispatch ``self``-lookups."""
__all__ = ("Delegate",)
class Delegate(object):
"""
Base class for objects that dispatch ``self``-lookups.
:ivar master: Object to where attribute calls are dispatched
"""
def __getattr__(self, name):
"""Return value of master attribute."""
return getattr(self.master, name)
def __init__(self, master):
"""Initialize a :class:`Delegate` object."""
object.__setattr__(self, "master", master)
def __setattr__(self, name, value):
"""Set value of master attribute."""
# Do not create new attributes for master.
if hasattr(self.master, name):
return setattr(self.master, name, value)
return object.__setattr__(self, name, value)
def _invariant(self):
# Default to checking master's class invariant.
if hasattr(self.master, "_invariant"):
return self.master._invariant()
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