stack loop
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class Stack
def_init_(self):
self.items=[]
def is_empty(self):
return self.items==[]
def push(self, data):
self.items.append(data)
def pop(self):
return self.items.pop()
s= Stack()
while True:
print(‘push<value>’)
print(‘pop’)
print(‘quit’)
do= input(‘What would you like to do?’).split()
operation= do[0].strip().lower()
if operation== ‘push’:
s.push(int(do[1]))
elif operation== ‘pop’:
if s.is_empty():
print(‘Stack is empty’)
else:
print(‘Popped value:’, s.pop())
elif operation==’quit’:
break