如何创建具有相同数据的多个散列引用？

class HashNode:
    def __init__(self, key, value):
        self.key = key
        self.value = value
        self.next = None

class HashTable:
    def __init__(self, size=10):
        self.size = size
        self.table = [None] * size

    def _hash(self, key):
        return hash(key) % self.size

    def insert(self, key, value):
        index = self._hash(key)
        node = self.table[index]
        if node is None:
            self.table[index] = HashNode(key, value)
        else:
            while node:
                if node.key == key:
                    node.value = value  # 更新值
                    return
                if node.next is None:
                    break
                node = node.next
            node.next = HashNode(key, value)

    def get(self, key):
        index = self._hash(key)
        node = self.table[index]
        while node:
            if node.key == key:
                return node.value
            node = node.next
        return None

# 示例使用
hash_table = HashTable()
hash_table.insert("key1", "value1")
hash_table.insert("key2", "value2")
hash_table.insert("key1", "updated_value1")  # 更新已存在的键

print(hash_table.get("key1"))  # 输出: updated_value1
print(hash_table.get("key2"))  # 输出: value2