hello-algo/codes/python/modules/list_node.py

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"""
File: list_node.py
Created Time: 2021-12-11
Author: Krahets (krahets@163.com)
"""
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class ListNode:
"""链表节点类"""
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def __init__(self, val: int):
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self.val: int = val # 节点值
self.next: ListNode | None = None # 后继节点引用
def list_to_linked_list(arr: list[int]) -> ListNode | None:
"""将列表序列化为链表"""
dum = head = ListNode(0)
for a in arr:
node = ListNode(a)
head.next = node
head = head.next
return dum.next
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def linked_list_to_list(head: ListNode | None) -> list[int]:
"""将链表反序列化为列表"""
arr: list[int] = []
while head:
arr.append(head.val)
head = head.next
return arr