AttributeError: 'NoneType' object has no attribute 'val'
while cur.val!=None:
Line 11 in removeNthFromEnd (Solution.py)
ret = Solution().removeNthFromEnd(param_1, param_2)
Line 41 in _driver (Solution.py)
_driver()
Line 52 in <module> (Solution.py)
为什么会出现这样的错误啊,我print head.val不会报错,现在令cur=head,为什么print cur.head就报错了呢,可以解释一下原因吗!请求指导