Write a Python function using a stack to detect if the input parameter is a palindrome. Stack file (stacktest.py):

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

def isEmpty(self): return self.items == []

def push(self, item): self.items.insert(0,item)

def pop(self): return self.items.pop(0)

def peek(self): return self.items[0]

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

class Stack: def _init__(self): self.items = [] def isEmpty (self): return self.items == [] def push(self, item) : self.items.insert (0, item) def pop (self): return self.items.pop (0) def peek (self): return self.items [0] def size (self): return len(self.items)