Hi, Le samedi 14 mai 2022 à 00:07:02 UTC+2, David Roe a écrit :
> I think the following should work: > > class MyObject: > def __classcall__(cls, arg): > if isinstance(arg, special): > return typecall(MyObject_specific_case, arg) > else: > return typecall(MyObject, arg) > > plus the same __init__ you had before. I haven't checked it though.... > David > > An alternative is to use __classcall_private__ For an example, see the class EuclideanSpace in src/sage/manifolds/differentiable/examples/euclidean.py <https://github.com/sagemath/sage/blob/develop/src/sage/manifolds/differentiable/examples/euclidean.py> EuclideanSpace(n) actually returns an instance of the subclass EuclideanPlane if n = 2 or of the subclass Euclidean3dimSpace if n = 3. Best wishes, Eric. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/39214e36-80fa-4a33-988a-852b1a225773n%40googlegroups.com.
