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stack_linkedlist.py
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stack_linkedlist.py
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class Node(object):
def __init__(self, data, next=None):
self.data = data
self.next = next
def __str__(self):
return '{}'.format(self.data)
def __repr__(self):
return self.__str__()
class StackLinkedList(object):
def __init__(self):
self.head = None
def push(self, data):
node = Node(data)
node.next = self.head
self.head = node
def pop(self):
if self.head is Node:
print("Stack is empty!")
return
node = self.head
data = node.data
self.head = node.next
return data
def display(self):
node = self.head
print("\nDisplay Nodes: ")
while node:
print(node.data)
node = node.next
if __name__ == '__main__':
sl = StackLinkedList()
sl.push(14)
sl.push(-3)
sl.push(18)
sl.push(29)
sl.push(31)
sl.push(16)
sl.display()
i = sl.pop()
if i:
print("Item popped: {}".format(i))
i = sl.pop()
if i:
print("Item popped: {}".format(i))
i = sl.pop()
if i:
print("Item popped: {}".format(i))