1 class linkedStack(object):
2     class stackNode(object):
3         def __init__(self, item, link = None):
4             self.info = item
5             self.next = link
6     #---------------------------------        
7     def __init__(self):
8         self.myTop = None
9         self.size = 0
10    #------------------------------
11    def isEmpty(self):
12         
13    #------------------------------
14    def length(self):
15         
16    #-------------------------------
17    def top(self, element, underflow):
18         
19    #-------------------------------
20    def pop(self, element, underflow):
21        
22    #------------------------------
23    def push(self, element):
24        
25    #------------------------------
26    def display(self):
27          
28    #--------------------------------