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CoW
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CoW/common/singleton.py

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  1. def singleton(cls):

  2.     instances = {}

  3. 

  4.     def get_instance(*args, **kwargs):

  5.         if cls not in instances:

  6.             instances[cls] = cls(*args, **kwargs)

  7.         return instances[cls]

  8. 

  9.     return get_instance