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30 lines
1.1 KiB
30 lines
1.1 KiB
9 years ago
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# This file is part of Korman.
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#
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# Korman is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Korman is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Korman. If not, see <http://www.gnu.org/licenses/>.
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class GoodNeighbor:
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"""Leave Things the Way You Found Them! (TM)"""
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def __enter__(self):
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self._tracking = {}
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return self
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def track(self, cls, attr, value):
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self._tracking[(cls, attr)] = getattr(cls, attr)
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setattr(cls, attr, value)
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def __exit__(self, type, value, traceback):
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for (cls, attr), value in self._tracking.items():
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setattr(cls, attr, value)
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