#stack Implementation
#Stack, isEmpty or not ? , push element, pop element
class Stack:

	def __init__(self):
		self.items = []

	def isEmpty(self):
		if self.itmes==[]:
			return True
		else:
			return False


	def push(self,item):
		return self.items.append(item)

	def pop(self):
		return self.items.pop()

	def peek(self):
		return	self.itmes[len(self.itmes)-1]

	def size(self):
		return len(self.items)


s=Stack()

s.push(11)
s.push(True)
s.push('ass')
print(s.items)
#print(s.isEmpty())
#print(s.peek())

var=s.pop()
print(var)
print(s.items)
var2=s.isEmpty()
print(var2)