rustworkx.PyDAG.add_edge

PyDAG.add_edge(parent, child, edge, /)

Add an edge between 2 nodes.

Use add_child() or add_parent() to create a node with an edge at the same time as an edge for better performance. Using this method will enable adding duplicate edges between nodes if the check_cycle attribute is set to True.

Parameters:

• parent (int) – Index of the parent node

• child (int) – Index of the child node

• edge – The object to set as the data for the edge. It can be any python object.

Returns:

The edge index of the created edge

Return type:

int

Raises:

When the new edge will create a cycle