How do you create and empty linked list node in python?

Question

According to leetcode this is the definition of a linked list

# Definition for singly-linked list.
# class ListNode:
#     def __init__(self, val=0, next=None):
#         self.val = val
#         self.next = next

How do you create a single node that when called outputs

[]

instead of

[0]

In the merge two linked lists if we pass two empty nodes then the output is also an empty node, the question is how do you make an empty ListNode that has a value other than 0 or None

Answer 1

I had the same problem as you but I just figured it out. All you have to do is return None and Leetcode will accept it. I tested it on Leetcode problem 23, Merge k Sorted Lists.