def Cache(func):
    class CacheCls(object):
        def __init__(self, func):
            if func.func_code.co_argcount > 0:
                self.values = {}
            else:
                self.values = None
                self.cached = False
                self.value = None

            self.func = func
        
        def __call__(self, *args, **kwargs):
            if self.values == None:
                if not self.cached:
                    self.value = self.func()
                    self.cached = True
                return self.value
            
            key = `(args, kwargs)`

            try:
                return self.values[key]
            except KeyError:
                pass

            value = self.values[key] = self.func(*args, **kwargs)
            return value

    return CacheCls(func)