data / utils.py

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import abc

class Singleton(abc.ABC):
    _instances = {}

    def __new__(cls, *args, **kwargs):
        if cls not in cls._instances:
            cls._instances[cls] = super(Singleton, cls).__new__(cls)
        return cls._instances[cls]
    

	import abc

	class Singleton(abc.ABC):
	_instances = {}

	def __new__(cls, args, *kwargs):
	if cls not in cls._instances:
	cls._instances[cls] = super(Singleton, cls).__new__(cls)
	return cls._instances[cls]