Stack_Implementation

class Stack:
    def __init__(self, Size):
        self.Stack = [None]*Size
        self.Ind = -1

    def Push(self, Val):
        self.Ind += 1
        self.Stack[self.Ind] = Val

    def Pop(self):
        self.Stack[self.Ind] = None
        self.Ind -= 1

    def Peek(self):
        return self.Stack[self.Ind]

    def isEmpty(self):
        return self.Ind == -1

StackObj = Stack(5)
StackObj.Push(10)
StackObj.Push(12)
StackObj.Push(16)
print(StackObj.Peek())
StackObj.Pop()
print(StackObj.Peek())
StackObj.isEmpty()
print(StackObj.Stack)