node_attribute_xy

node_attribute_xy(G, attribute, nodes=None)

Returns iterator of node-attribute pairs for all edges in G.

Parameters:

G: NetworkX graph

attribute: key

The node attribute key.

nodes: list or iterable (optional)

Use only edges that are incident to specified nodes. The default is all nodes.

Returns:

(x, y): 2-tuple

Generates 2-tuple of (attribute, attribute) values.

Notes

For undirected graphs each edge is produced twice, once for each edge representation (u, v) and (v, u), with the exception of self-loop edges which only appear once.

Examples

>>> G = nx.DiGraph()
>>> G.add_node(1, color="red")
>>> G.add_node(2, color="blue")
>>> G.add_edge(1, 2)
>>> list(nx.node_attribute_xy(G, "color"))
[('red', 'blue')]