numerical_node_match#

numerical_node_match(attr, default, rtol=1e-05, atol=1e-08)[source]#

Returns a comparison function for a numerical node attribute.

The value(s) of the attr(s) must be numerical and sortable. If the sorted list of values from G1 and G2 are the same within some tolerance, then the constructed function returns True.

Parameters:

attrstring | list: The name of the numerical node attribute to compare, or a list of numerical node attributes to compare.
defaultvalue | list: If attr is a string, the default numerical value for that attribute. Otherwise, a list of same length as attr with default values for each attribute.
rtolfloat: The relative error tolerance.
atolfloat: The absolute error tolerance.

Returns:

matchfunction: The customized, numerical node_match function.

Examples

>>> import networkx.algorithms.isomorphism as iso
>>> nm = iso.numerical_node_match("weight", 1.0)
>>> nm = iso.numerical_node_match(["weight", "linewidth"], [0.25, 0.5])