Data Structures - Stacks and Queues in Python
Implementing Stack in Python using a List def push(stack, element): stack.append(element) top = len(stack) - 1 def pop(stack): if stack == []: return 'UNDERFLOW' element = stack.pop() if len(stack) == 0: top = None else: top = len(stack) - 1 return element def peek(stack): if stack == []: return 'UNDERFLOW' top = len(stack) - 1 return stack[top] def display(stack): if stack == []: print('STACK EMPTY') else: top = len(stack) - 1 print(str(stack[top]) + "<--top") for i in range(top - 1, -1, -1): print(stack[i]) stack = [] top = None while True: p...