__author__ = 'Tom'
class Node:

    def __init__(self):
        self.next = None

def addNode(ref, number):
    new = Node()
    new.data = number
    if ref is None:
        ref = new
    else:
        while ref.next is not None:
            ref = ref.next
        ref.next = new
    return ref

rootNode = addNode(None,33)
addNode(rootNode,45)
addNode(rootNode,32)
print(rootNode)