Guido van Rossum wrote:
But that currently doesn't work. Tbe most future-proof solution would be to put some kind of object in the dict values whose attributes can guide various metaclasses. Perhaps:
class slotprop(object): def __init__(self, **kwds): self.__dict__.update(kwds)
class C(object): __slots__ = {'slot1': slotprop(doc="this is the docstring"), 'slit2': slotprop('doc="another one")}
Wouldn't it be just as future-proof to make __slots__ a list of bare slot names or objects? One advantage is that slot names don't have to be carried around externally to the objects. Moreover, using standard attribute names like __name__ and __doc__ will make the solution more future-proof. The default metaclass will handle __slots__ along these lines: for item in obj.__slots__: if isinstance(item, StringTypes): slot_name, slot_doc = item, None else: slot_name = item.__name__ slot_doc = getattr(item, '__doc__', None) In that way, the default metaclass does not impose any restrictions on what the slot objects are. Example usage: class MySlot(object): def __init__(self, name, doc=None): self.__name__ = name self.__doc__ = doc class C(object): __slots__ = ['slot1', MySlot('slot2', 'this is the docstring')] -John -- http:// ift ile.org/