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get_adjacency_sparse broken with scipy 1.13 and empty graphs #871
Description
Describe the bug
get_adjacency_sparse does sparse.csr_matrix((weights, list(zip(*edges))), shape=(N, N))
Since scipy 1.13, the constructor apparently expects edge tuples of length 2, and with an empty graph, zip(*edges) becomes ().
To reproduce
Call get_adjacency_sparse with scipy 1.13+ installed and you will see
ValueError: mismatching number of index arrays for shape; got 0, expected 2Version information
1.0.0 from PyPI
Activity
[-]`get_adjacency_sparse` broken with scipy 1.13[/-][+]`get_adjacency_sparse` broken with scipy 1.13 and empty graphs[/+]