Python Nodes In A List

Quick and simple Python list with node insert capabilty.

class Node:
    def __init__(self,value):
        self.data = value
        self.next = 0

class List:
    def __init__(self):
        self.firstNode = Node(0)
    def __ShowNodeData(self,aNode):
        if aNode.next != 0:
           print aNode.data
           self.__ShowNodeData(aNode.next)
    def Dump(self):
        self.__ShowNodeData(self.firstNode)
    def InsertAfter(self,aNode,aNewNode):
        aNewNode.next = aNode.next
        aNode.next = aNewNode
    def InsertBeginning(self,aNewNode):
        aNewNode.next = self.firstNode
        self.firstNode = aNewNode   

nodeA = Node("A")
nodeB = Node("B")
nodeC = Node("C")
nodeD = Node("D")

aList = List()

aList.InsertBeginning(nodeB)
aList.InsertAfter(nodeB,nodeD)
aList.InsertAfter(nodeD,nodeC)
aList.InsertAfter(nodeC,nodeA)
 
aList.Dump()