21 lines
494 B
Python
21 lines
494 B
Python
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class Dispatcher(object):
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"""
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create object by dispatcher to reuse object.
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"""
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_dispatcher = dict()
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@classmethod
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def dispatcher(cls, *args, **kwargs):
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key = cls.dispatcher_key(*args, **kwargs)
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obj = cls._dispatcher.get(key, None)
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if obj is None:
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obj = cls(*args, **kwargs)
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cls._dispatcher[key] = obj
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return obj
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@classmethod
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def dispatcher_key(cls, *args, **kwargs):
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raise NotImplementedError()
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