Hi Jori, when I want to iterate through posets, I do this:
sage: P3 = Posets(3); P3 Posets containing 3 vertices sage: list(P3) [Finite poset containing 3 elements, Finite poset containing 3 elements, Finite poset containing 3 elements, Finite poset containing 3 elements, Finite poset containing 3 elements] The ``Posets`` function is in sage.combinat.posets.poset_example and when given a number, it returns an instance of ``FinitePosets_n`` in sage.combinat.posets.posets. I think for now, we only have the iteration up to isomorphism. >From a user point of view, it would seem natural to have something like sage: Posets(3, ... some options ...) Posets containing 3 vertices with ... some options ... which could indeed return a new class ``FinitePosets_n_with_properties`` in the model of ``FinitePosets_n`` or even just allow those properties on ``FinitePosets_n`` (not sure which option is best). Best, Viviane 2015-06-14 9:40 GMT-05:00 Nathann Cohen <nathann.co...@gmail.com>: > Would this be good interface: >> >> Posets_iterator(n, properties=None, width=None, height=None) >> > > Do you have a specific reason for creating a class Posets_iterator? Or > would a simple function do the job? > > Whatever you chose, it should probably be made available as an element of > posets.<tab>. For graphs, you can do "list(graphs(6))", but you may want to > not copy this kind of behaviour. It's up to you. You could also have > posets.posets_iterator() or posets.posets_all() or posets.posets(), > whichever you prefer (or others I did not think of). > > Then, you have the problem of the "Posets" object, exported in the global > namespace. Right now, this thing is the "category of Posets". So if you > want something like the following to work, you will have to mess with this > category (or replace it by another object) > > sage: for p in Posets(max_width=3,max_height=4,num_points=90): > ....: <do_something> > > Of course, its __iter__ method would be your iterator. > > Nathann > > -- > 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 post to this group, send email to sage-devel@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/d/optout. > -- 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 post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
