问题遇到的现象和发生背景
为什么定义了链表类还是报错
'list' object has no attribute 'val'
用代码块功能插入代码,请勿粘贴截图
from typing import Optional
# Definition for singly-linked list.
class ListNode:
def __init__(self, val=0, next=None):
self.val = val
self.next = next
class Solution:
def addTwoNumbers(self, l1: ListNode, l2: ListNode) -> ListNode:
head = ListNode(l1.val+l2.val)
current = head
while l1.next and l2.next:
l1 = l1.next
l2 = l2.next
current.next = ListNode(l1.val+l2.val+current.val//10)
current.val = current.val % 10
current = current.next
if l1.next == None and l2.next:
while l2.next:
l2 = l2.next
current.next= ListNode(l2.val+current.val//10)
current.val = current.val % 10
current = current.next
current.next = l2.next
elif l2.next == None and l1.next:
while l1.next:
l1 = l1.next
current.next= ListNode(l1.val+current.val//10)
current.val = current.val % 10
current = current.next
current.next = l2.next
if current.val >= 10:
current.next = ListNode(current.val//10)
current.val = current.val % 10
return head
l1 = [2, 4, 3]
l2 = [5, 6, 4]
a = Solution()
print(a.addTwoNumbers(l1, l2))
运行结果及报错内容
"E:\python project\venv\Scripts\python.exe" "E:\python project\两数相加.py"
Traceback (most recent call last):
File "E:\python project\两数相加.py", line 46, in
print(a.addTwoNumbers(l1, l2))
File "E:\python project\两数相加.py", line 14, in addTwoNumbers
head = ListNode(l1.val+l2.val)
AttributeError: 'list' object has no attribute 'val'