Hello, There is a weirdness in the initialization of Parent with a facade. Consider the following example
class MySet(Parent): def __init__(self): Parent.__init__(self, category=(FiniteEnumeratedSets(), Monoids())) The category of an instance of MySet is just a join of the two categories. When I add a facade argument to the initialization of Parent as in class MyFacadeSet(Parent): def __init__(self): Parent.__init__(self, category=(FiniteEnumeratedSets(), Monoids()), facade=FreeMonoid(2, 'ab')) I got the error "AttributeError: 'tuple' object has no attribute 'is_subcategory'". It is few lines in Parent.__init__ but I suspect that some ticket solves the problem yet. Does anybody know what should I do? Best, Vincent -- -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org