如何使用iterable将元素从UnorderedList转移到数组

# 定义一个UnorderedList类
class UnorderedList:
    def __init__(self):
        self.head = None
    
    # 在链表尾部添加元素
    def append(self, item):
        temp = Node(item)
        if self.head is None:
            self.head = temp
        else:
            current = self.head
            while current.next is not None:
                current = current.next
            current.next = temp
    
    # 返回链表中所有元素的迭代器
    def __iter__(self):
        current = self.head
        while current is not None:
            yield current.data
            current = current.next

# 定义一个Node类，用于构建链表节点
class Node:
    def __init__(self, data):
        self.data = data
        self.next = None

# 创建一个UnorderedList实例并添加元素
ul = UnorderedList()
ul.append(1)
ul.append(2)
ul.append(3)

# 使用iterable将元素从UnorderedList转移到数组
array = []
for item in ul:
    array.append(item)

# 打印转移后的数组
print(array)