How to compare two linked lists

class Node:
    def __init__(self, data):
        self.data = data 
        self.next = None  
class SinglyLinkedList:
    def __init__(self):
        self.head = None
        self.tail = None
    # print list
    def print_ll(self):
        temp = self.head
        while temp:
            print(str(temp.data))
            temp = temp.next
  
    # insert a new node
    def insert(self, data):
        node = Node(data)
        if not self.head:
            self.head = node
        else:
            self.tail.next = node
        self.tail = node
# create a linked list 
l1 = SinglyLinkedList()
# create an array
l1val = [1,2,3,4,5]
# insert elements into the list
for i in l1val:
    l1.insert(i)
    
# print list
l1.print_ll()

class Node:
    def __init__(self, data):
        self.data = data
        self.next = None
class SinglyLinkedList:
    def __init__(self):
        self.head = None
        self.tail = None
    
    # insert a new node
    def insert(self, data):
        node = Node(data)
        if not self.head:
            self.head = node
        else:
            self.tail.next = node
        self.tail = node
        
# function to compare two lists
def compare_lists(llist1, llist2):
    now1 = llist1
    now2 = llist2
    while now1 != None and now2 != None:
        if now1.data != now2.data:
            return 0
        now1 = now1.next
        now2 = now2.next
    if now1 != None or now2 != None:
        return 0
    return 1
# create the first list
l1 = SinglyLinkedList()
l1val = [1,2,3,4,5]
for i in l1val:
    l1.insert(i)
# create the second list
l2 = SinglyLinkedList()
l2val = [1,2,3,4]
for i in l2val:
    l2.insert(i)
# create the third list
l3 = SinglyLinkedList()
l3val = [1,2,3,4,5]
for i in l3val:
    l3.insert(i)
# compare the first and the second lists
print(compare_lists(l1.head,l2.head))
# compare the first and the third lists
print(compare_lists(l1.head,l3.head))