Block.edge_attribute
- Block.edge_attribute(edge, name, value=None)
Get or set an attribute of an edge.
- Parameters:
- edgetuple[int, int]
The identifier of the edge as a pair of vertex identifiers.
- namestr
The name of the attribute.
- valueobject, optional
The value of the attribute. Default is None.
- 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.