def prepare_routes(node_dictionary):
"""Creates a map of nodes using the processed raw graph data.
Args:
node_dictionary (dict): mapping of a node to its output nodes
and respective distance.
Returns:
Route: a Route object containing all the Node objects.
"""
route = Route()
for item in node_dictionary:
node = Node(item)
for tup in node_dictionary[item]:
output_node = tup[0]
distance = tup[1]
node.add_output_node(output_node, distance)
route.add_node(node)
route.name_node_dictionary[node.code] = node
return route
