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categorical_node_match(attr, default)[source]

Returns a comparison function for a categorical node 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 node attribute to compare, or a list of categorical node attributes to compare.

default : value | list

The default value for the categorical node attribute, or a list of default values for the categorical node attributes.


match : function

The customized, categorical \(node_match\) function.


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