class Node:
    def __init__(self, value):
        self.value = value
    def __str__(self):
        return self.value
    def __repr__(self):
        return self.__str__()

class Graph:
    def __init__(self):
        self.nodes = []
        self.connections = {}
        self.new_node("root")

    def new_node(self,value, connections= None):
        value = Node(value)
        self.connections[value] = connections
        self.nodes.append(value)

    def add_connection(self, node_name, connections):
        self.connections[node_name] = connections


def create_graph():
    g = Graph()
    g.new_node("1")
    g.add_connection("1", ["root","2","3"])
    g.new_node("2")
    g.add_connection("2", ["root","3","4"])
    g.new_node("3")
    g.new_node("4")
    g.add_connection("3", ["5"])
    g.new_node("5")

create_graph()