Singleton-esque one instance factory(?) in Python

factory.py

class Factory(object):
    inst=None
    @classmethod
    def get(self):
        if self.inst == None:
            # new instance of self
            self.inst = self # instantiate() to run __init__
            self.inst.__init__(self)
            # apply @classmethod to all methods
            for name,attr in self.__dict__.items():
                if callable(getattr(self, name)) and name != "__init__":
                    setattr(self, name, classmethod(attr))
        return self.inst