util/Singleton.py


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class Singleton(object):
    _instance = None
    def __new__(cls, * args, ** kwargs):
        if not cls._instance:
            cls._instance = super(Singleton, cls).__new__(
                                                          cls, * args, ** kwargs)
        return cls._instance


if __name__ == '__main__':
    s1 = Singleton()
    s2 = Singleton()
    if s1 == s2:
        print "Same"
    else:
        print "Different"