0237.py

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

class Solution:
    def deleteNode(self, node):
        """
        :type node: ListNode
        :rtype: void Do not return anything, modify node in-place instead.
        """
        if node == None:
            return node

        if node.next == None:
            node = None
             
        node.val = node.next.val
        node.next = node.next.next
        

def createList():
    head = ListNode(0)
    cur = head
    for i in range(1, 10):
        cur.next = ListNode(i)
        cur = cur.next
    return head
            
def printList(head):
    cur = head
    while cur != None:
        print(cur.val, '-->', end='')
        cur = cur.next

    print('NULL')

if __name__ == "__main__":
    head = createList()
    printList(head)
    res = Solution().deleteNode(head)
    printList(res)