2011-09-06 00:45:53 +00:00
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# Copyright 2010-2011 Florent Le Coz <louiz@louiz.org>
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2011-03-05 20:42:56 +00:00
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#
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# This file is part of Poezio.
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#
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# Poezio is free software: you can redistribute it and/or modify
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2011-09-11 15:10:05 +00:00
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# it under the terms of the zlib license. See the COPYING file.
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2011-03-05 20:42:56 +00:00
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"""
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Defines a Singleton function that initialize an object
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of the given class if it was never instantiated yet. Else, returns
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the previously instantiated object.
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This method is the only one that I can come up with that do not call
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__init__() each time.
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"""
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instances = {}
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def Singleton(cls, *args, **kwargs):
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if not cls in instances:
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instances[cls] = cls(*args, **kwargs)
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return instances[cls]
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