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- #
- # This file is part of Checkbox.
- #
- # Copyright 2008 Canonical Ltd.
- #
- # Checkbox 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.
- #
- # Checkbox 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 Checkbox. If not, see <http://www.gnu.org/licenses/>.
- #
- class Cache(object):
-
- def __init__(self, function):
- self._cache = {}
- self._function = function
-
- def __get__(self, instance, cls=None):
- self._instance = instance
- return self
-
- def __call__(self, *args):
- if not self._cache.has_key((self._instance,) + args):
- self._cache[(self._instance,) + args] = self._function(self._instance, *args)
-
- return self._cache[(self._instance,) + args]
-
-
- def cache(function):
- return Cache(function)
-