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Wed Mar 24 16:09:45 EST 2004 · http://mail.python.org/pipermail/python-dev/2004-March/043481.html

At 09:41 PM 3/24/04 +0100, Alex Martelli wrote:

>Perhaps something like...:
>
>class metaSingleton(type):
>     def __new__(cls, classname, classbases, classdict):
>         result = type.__new__(cls, classname, classbases, classdict)
>         if classbases:
>             return result()
>         else:
>             return result

By the way, there's a bug in the above implementation: it can't be safely 
mixed with other metaclasses, because it calls 'type' directly instead of 
using 'super()'.

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[Python-Dev] PEP 318 - posting draft