delete node in a linked list

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

class Solution(object):
    def deleteNode(self, node):
        """
        :type node: ListNode
        :rtype: void Do not return anything, modify node in-place instead.
        """
        head = node
        while head.next.next!=None:
            head.val = head.next.val
            head = head.next
        head.val=head.next.val    
        head.next=None