17 lines
335 B
Python
17 lines
335 B
Python
class Singleton(object):
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"""
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Singleton design pattern.
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"""
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_instance = None
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def __init__(self):
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if self.__class__ is Singleton:
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raise TypeError("Cannot instantiate directly.")
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@classmethod
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def get_instance(cls):
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"""Get the class instance."""
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if cls._instance is None:
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cls._instance = cls()
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return cls._instance
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