iki stack'ın aynı olup olmadığını kontrol eden program

stackayni.py

class Stack:
    def __init__(self):
        self.alist=[]
    def pop(self):
        return self.alist.pop()
    def push(self,a):
        self.alist.append(a)
    def show(self):
        return self.alist
    def peek(self):
        return self.alist[len(self.alist)-1]
    def isempty(self):
        return len(self.alist)==0
    def size(self):
        return len(self.alist)
    
def aynimi(a,b):
    dengeli=True
    if a.size()!=b.size():
        return False
    else:
        if a.isempty() and b.isempty():
            return True
        else:
            while a.isempty()==False and b.isempty()==False:
                if a.pop()!=b.pop():
                    dengeli=False
                    break
    return dengeli

s=Stack()
a=Stack()
s.push('a')
s.push('b')
print (aynimi(s,a))