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Python - Stack Implementation using Linked List

Stack Implementation using Linked List in Python.
Run the code here: https://repl.it/@VinitKhandelwal/Stack











class Stack:



  def __init__(self):



    self.reset()



  def reset(self):



    self.top = None



  def push(self, value):



    new_node = Node(value)



    if self.top is not None:



      new_node.pointer = self.top



    self.top = new_node



  def peek(self):



    if self.top is not None:



      print(self.top.value)



  def pop(self):



    if self.top.pointer == None:



      self.reset()



    else:



      self.top = self.top.pointer



class Node:



  def __init__(self, value=None, pointer=None):



    self.value = value



    self.pointer = pointer



obj = Stack()



obj.push(5)



obj.push(4)



obj.push(3)



obj.push(2)



obj.push(1)



obj.peek()



obj.pop()



obj.peek()



obj.pop()



obj.peek()



obj.pop()



obj.peek()



obj.pop()



obj.peek()



obj.pop()



obj.peek()

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