@staticmethod with @property

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User kaizer.se was onto something as far as the original question goes. I took it a step further in terms of simplicity, so that it now requires only a single decorator:

class classproperty(property):
    def __get__(self, cls, owner):
        return classmethod(self.fget).__get__(None, owner)()

Usage:

class Stats:
    _current_instance = None

    @classproperty
    def singleton(cls):
        if cls._current_instance is None:
            cls._current_instance = Stats()
        return cls._current_instance

As noted, this way of creating a singleton is not a good design pattern; if that must be done, a metaclass factory is a much better way to do it. I was just excited about the prospect of a class property though, so, there it is.

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