I’m new in this library and I read the tutorial but i still in doubt. I need to creating a project using Dijkstra’s algorithm, so then I have a map and I need to calculate the shortest path. To do that I need to set len(distance) in the edges, for example I have to go from New York to Boston there’s 220 miles, so this edge that connect these citys need to has the value of 220. With what function can I do that? and how can I after from setting all the distances beetween the cities calculate the shortest path?