Hi!

I was excited to see that one can now generate some hypergraphs in sage via 
nauty's bipartite graph genbg function. Looking through nauty's source I 
saw that there's a prune routine that can be called at every stage of 
generation, it "just" needs to be implemented. I was wondering if there are 
any plans to implement an "avoider" prune function to be able to generate 
all hypergraphs (up to isomorphism) which avoid a given set of small 
hypergraphs. I am pretty sure that it would be a very popular feature, as 
virtually all extremal combinatorics people would find it useful! 

Thanks heaps,
jakub

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