一方向チェーンテーブルpython実装

class Node:

    #     ，    
    def __init__(self, item):
        #           
        self._item = item
        self._next = None

    #     getItem(),        
    def get_item(self):
        return self._item

    #     setItem(),        
    def set_item(self, item):
        self._item = item

    #     getNext(),        
    def get_next(self):
        return self._next

    #     setNext(),        
    def set_next(self, node):
        self._next = node

    #     destroyNode(),     
    def destory_node(self):
        self._item = None
        self._next = None