difference

difference(G, H)

Returns a new graph that contains the edges that exist in G but not in H.

The node sets of H and G must be the same.

Parameters:

G,Hgraph

A NetworkX graph. G and H must have the same node sets.

Returns:

DA new graph with the same type as G.

Notes

Attributes from the graph, nodes, and edges are not copied to the new graph. If you want a new graph of the difference of G and H with the attributes (including edge data) from G use remove_nodes_from() as follows:

>>> G = nx.path_graph(3)
>>> H = nx.path_graph(5)
>>> R = G.copy()
>>> R.remove_nodes_from(n for n in G if n in H)

Examples

>>> G = nx.Graph([(0, 1), (0, 2), (1, 2), (1, 3)])
>>> H = nx.Graph([(0, 1), (1, 2), (0, 3)])
>>> R = nx.difference(G, H)
>>> R.nodes
NodeView((0, 1, 2, 3))
>>> R.edges
EdgeView([(0, 2), (1, 3)])
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Additional backends implement this function

graphblas : OpenMP-enabled sparse linear algebra backend.