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categorical_edge_match(attr, default)[source]

Returns a comparison function for a categorical edge attribute.

The value(s) of the attr(s) must be hashable and comparable via the == operator since they are placed into a set([]) object. If the sets from G1 and G2 are the same, then the constructed function returns True.

  • attr (string | list) – The categorical edge attribute to compare, or a list of categorical edge attributes to compare.
  • default (value | list) – The default value for the categorical edge attribute, or a list of default values for the categorical edge attributes.

match – The customized, categorical \(edge_match\) function.

Return type:



>>> import networkx.algorithms.isomorphism as iso
>>> nm = iso.categorical_edge_match('size', 1)
>>> nm = iso.categorical_edge_match(['color', 'size'], ['red', 2])