def DrawPath(G, source, dest):
	pos = nx.spring_layout(G)
	val_map = {}
	val_map[source] = 'green'
	val_map[dest] = 'red'
	values = [val_map.get(node, 'blue') for node in G.nodes()]
	nx.draw(G, pos, with_labels = True, node_color = values, edge_color = 'b' ,width = 1, alpha = 0.7)  #with_labels=true is to show the node number in the output graph
	edge_labels = dict([((u, v,), d['length']) for u, v, d in G.edges(data = True)])
	nx.draw_networkx_edge_labels(G, pos, edge_labels = edge_labels, label_pos = 0.5, font_size = 11) #prints weight on all the edges
	return pos



#main function
if __name__ == "__main__":
	G, source,dest = CreateGraph()
	heuristics = getHeuristics(G)
	pos = DrawPath(G, source, dest)
	greedyBFS(G, source, dest, heuristics, pos)
	plt.show()