astar_path_length(G, source, target, heuristic=None, weight='weight')¶
Returns the length of the shortest path between source and target using the A* (“A-star”) algorithm.
G (NetworkX graph)
source (node) – Starting node for path
target (node) – Ending node for path
heuristic (function) – A function to evaluate the estimate of the distance from the a node to the target. The function takes two nodes arguments and must return a number.
NetworkXNoPath – If no path exists between source and target.