class Node:
def __init__(self,data):
self.data = data
self.next = None
def setTop(self,data):
self.Top = data
class Stack:
def __init__(self, top=None):
self.top = top
self.bottom = None
self.length = 0
def peek(self):
x = self.top
if x != None:
print(x.data)
else:
print('None')
def push(self,data):
node = Node(data)
node.next = self.top
self.top = node
self.length+=1
def pop(self):
curr = self.top
self.top = curr.next
self.length-=1
def isEmpty(self):
if self.top == None:
print('True')
else:
print('False')
if __name__ == '__main__':
stack = Stack()
stack.push('Google')
stack.push(10)
stack.push('Udemy')
stack.push(50)
stack.pop()
stack.pop()
stack.pop()
stack.pop()
stack.peek()
stack.isEmpty()
