Hi Nathann, Thank you! Wrapping DiGraph around seems to work. I assume that it worked before without the DiGraph on DynkinDiagrams since it was used in code for Stanley symmetric functions by Steve Pon.
Thanks, Anne Nathann Cohen wrote:
Hello !! I think t he problem just comes from the fact that DynkinDiagram(['C', 3,1]) is not just a DiGraph object but a.... DynkinDiagram object. I expect it to inherit from DiGraph for its .subgraph method. Sadly, this method is written both for Graph and DiGraph, and it created the new object by calling the self.__class__ constructor, which works nicely for Graph and DiGraphs, but not for your object as its constructor method is not as general as Graph or DiGraph (and is clearly not inherited from DiGraph's ) :-) Did it ever work ? In the meantime, you can try the following : DiGraph(DynkinDiagram(['C',3,1])).subgraph([1]) Nathann
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