Stack/Python

Stack.py

# -*- coding: utf-8 -*-
"""
Created on Mon Oct 10 10:33:04 2016
@author: abhik
Stack Implementation
"""
class Stack(object):
    def __init__(self,limit=10):
        self.stk=[]
        self.limit=limit
    def isEmpty(self):
        return len (self.stk)<=0
    def push(self,item):
        if len(self.stk) >=self.limit:
            print "Stack OverFlow"
        else :
            self.stk.append(item)
        print "Stack after Push",self.stk
    def pop(self):
        if len(self.stk)<=0:
            print "Stack UnderFlow"
        else:
            return self.stk.pop()
    def peek(self):
        if len(self.stk)<=0:
            print "Stack UnderFlow"
            return 0
        else:
            return self.stk[-1]
    def size(self):
        return len(self.stk)
if __name__=="__main__":
    stack=Stack()
    stack.push(21)
    stack.pop()
    print stack.peek()