Graph.edge_attribute

Graph.edge_attribute(key, name, value=None)

Get or set an attribute of an edge.

Parameters:

keytuple[hashable, hashable]

The identifier of the edge as a pair of node identifiers.

namestr

The name of the attribute.

valueobj, optional

The value of the attribute.

Returns:

object | None

The value of the attribute, or None when the function is used as a “setter”.

Raises:

KeyError

If the edge does not exist.

See also

unset_edge_attribute()

edge_attributes(), edges_attribute(), edges_attributes()

node_attribute(), node_attributes(), nodes_attribute(), nodes_attributes()