DijkstraVisitor#

class DijkstraVisitor[source]#

Bases: object

A visitor object that is invoked at the event-points inside the dijkstra_search() algorithm. By default, it performs no action, and should be used as a base class in order to be useful.

Methods

`discover_vertex`	This is invoked when a vertex is encountered for the first time and it's popped from the queue.
`edge_not_relaxed`	Upon examination, if the edge is not relaxed, this event is emitted.
`edge_relaxed`	Upon examination, if the distance of the target of the edge is reduced, this event is emitted.
`examine_edge`	This is invoked on every out-edge of each vertex after it is discovered.
`finish_vertex`	This is invoked on vertex v after all of its out edges have been examined.