Graph.edge_attribute

Graph.edge_attribute(key, name, value=None)[source]

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.