Stack using Array

 class stackarray:

    def __init__(self):

        self.stack=[]

    def is_empty(self):

        return len(self.stack)==0

    def push(self,item):

        self.stack.append(item)

    def pop(self):

        if self.is_empty():

            return "stack is empty"

        return self.stack.pop()

    def peek(self):

        if self.is_empty():

            return "stack is empty"

        return self.stack[-1]

stack = stackarray()

stack.push(10)

stack.push(20)

stack.push(30)

print(stack.pop())

print(stack.peek())

Output:-

30

20