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2025-04-02 91b7ec2b67d74e4d2e41c857232414feb3cb7bfd

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def singleton(cls):
    """
    单例装饰器
    @param cls:
    @return:
    """
    instances = {}
 
    def get_instance(*args, **kwargs):
        if cls not in instances:
            instances[cls] = cls(*args, **kwargs)
        return instances[cls]
 
    return get_instance