basically what you need

palindrome.py

myQueue = []

myString = "Tacocat"

myString.toLower()

for index,character in enumerate(myString):
    myQueue.append(myString[index])

myStack = myQueue.reverse()

is_palindrome = True

while True:
    stack_character = myStack.pop()
    queue_character = myQueue.pop()

    if not stack_character or not queue_character
        break
    if stack_character != queue_character:
        is_palindrome == False
        break

if is_palindrome:
    print myString + " is a palindrome."
else:
    print myString + " is not a palindrome."