OR-ToolsでVehicle Routing Problem(VRP)を解く

ortools  v9.0.9048
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#routeXY
routeXY = [[0,0],[0,-2],[-4,-2],[-2,-1],[-3,1],[-1,2],[-4,2],[4,-2],[3,1],[4,2]]
distance = []
for i in range(len(routeXY)):
    distance.append([])
    for j in range(len(routeXY)):
        distance[i].append(abs(routeXY[i][0]-routeXY[j][0])+abs(routeXY[i][1]-routeXY[j][1]))
print("distance:")
print(distance)