It used to insert a data in the stack.

   It using append() to add the data into the stack.

Pop:

   It used to remove an element from the list.

   Pop function removes the top element first.

   Because stack follows first in last out principle.

class Stack:
def __init__(self):
self.stack = []

#add the element in a stack
def add(self, data):
if data not in self.stack:
self.stack.append(data)
return True
else:
return False
#Use show to look all elements in the stack
def show(self):
return self.stack

#remove an element from stack
def remove(self):
if len(self.stack) <= 0:
return (“No element in the Stack”)
else:
return self.stack.pop()
#object creation
s = Stack()

#pass data in to the stack
s.add(“sathish”)
s.add(“Bala”)
s.add(“krishna”)
s.add(“Prakash”)
print(“*****Original Stack is****”)
print(s.show())
print(“\n”)

#removing data from the stack
print(“*****Removing following elements from stack****”)
print(s.remove())
print(s.remove())
print(“\n”)
print(“*****After removing****”)
print(s.show())