BnB TSP should use proper infinity masks...

bnb_tsp.py

@@ -26,7 +26,7 @@ class Node:
             Node(
                 self.node_list + [node],
                 [s for s in self.successors if s != node],
-                self.distances
+                self.reduced_matrix
             )
             for node in self.successors
         ]
@@ -104,3 +104,7 @@ route = bnb_tsp([
     [5, 10, 9, None]
 ])
 print("best_route: ", route + [route[0]])
+
+d = gen_tsp_distance_matrix(10)
+route = bnb_tsp(d)
+print("best_route: ", route + [route[0]])