# create a class as stack name

class Stack:

def __init__(self):

self.arr = []

# creating a function for push operation

def push(self,data):

self.arr.append(data)

# for ckeck the stack is empty or not

def is_empty(self):

return self.arr == []

# for pop operation from the stack

def pop(self):

if self.is_empty():

print('Stack Is empty')

else:

self.arr.pop()

# for getting peek value

def peek(self):

if self.is_empty():

print('Satck Is Empty')

else:

return self.arr[-1]

# return the stack

def retstack(self):

return self.arr

# creating a object of stack class

ob1 = Stack()

# push item in stack

ob1.push(1)

ob1.push(2)

ob1.push(3)

res = ob1.retstack()

print('After Pushing 3 elements in stack :',res)

res = ob1.is_empty()

print('Stack is empty or not : ',res)

ob1.pop()

res = ob1.retstack()

print('After Pop 1 elements in stack :',res)

res = ob1.peek()

print('Peek element of stack : ',res)