insert_arc

insert_arc(k: PlanarDiagram, arc: tuple, **attr) → None

Inserts an arc between two nodes at specified positions in place, adjusting their endpoint positions to accommodate the new arc.

Args:

k (PlanarDiagram): The planar diagram where the arc is being inserted. arc (tuple): A tuple containing two endpoints (endpoint_a, endpoint_b)

where each endpoint is a tuple (node, position) specifying the node and position at which the arc should be connected.

**attr: Additional attributes to apply to the arc.

Raises:

NotImplementedError: If an arc is attempted to be inserted within the

same node (node_a == node_b).

Returns:

None