What do you call a class not intended to be instantiated

[Tim Rowe]

2008/9/22 Bruno Desthuilliers <bruno.42.desthuilliers at websiteburo.invalid>:
> Steven D'Aprano a écrit :
>>
>> On Mon, 22 Sep 2008 10:11:58 +0200, Bruno Desthuilliers wrote:
>>
>>> Steven D'Aprano a écrit :
>>>>
>>>> I have a class which is not intended to be instantiated. Instead of
>>>> using the class to creating an instance and then operate on it, I use
>>>> the class directly, with classmethods. Essentially, the class is used
>>>> as a function that keeps state from one call to the next.

Sounds to me like a functor, aka a function object:
http://en.wikipedia.org/wiki/Function_object

-- 
Tim Rowe