AttributeError: 'builtin_function_or_method' object has no attribute 'data'

Question

我试图在排序的链表中插入一个节点，插入后遍历它时显示属性错误。它正在插入节点并遍历，但最后它抛出错误。有人可以解释这里有什么问题吗？

def traversal(head):
    curNode = head
    while curNode is not None:
        print(curNode.data , end = '->')
        curNode = curNode.next
def insertNode(head,value):
    predNode = None
    curNode = head
    while curNode is not None and curNode.data < value:
        predNode = curNode
        curNode = curNode.next
    newNode = ListNode(value)
    newNode.next = curNode
    
    if curNode == head:
        head = newNode
    else:
        predNode.next = newNode
        
    return head

Answer 1

'builtin_function_or_method' object has no attribute 'x'

通常意味着您忘记将 () 添加到函数调用中，例如

>>> 'thing'.upper.replace("H", "") #WRONG
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'builtin_function_or_method' object has no attribute 'replace'

>>> "thing".upper().replace("H", "") #RIGHT
'TING'

虽然你的代码看起来是正确的，但我认为调用 traversal 和 insertNode 的任何东西都试图将函数的结果作为参数传递，但它传递的是函数（它缺少 ())

AttributeError: 'builtin_function_or_method' object has no attribute 'data'

AttributeError: 'builtin_function_or_method' object has no attribute 'data'

linked-list

attributeerror

python-3.x