如何在从文件读取到链表时添加空格字符？

class Node:
    def __init__(self, data):
        self.data = data
        self.next = None

def add_spaces(file_path):
    # 打开文件
    file = open(file_path, "r")
    
    # 读取文件内容
    file_content = file.read()
    
    # 关闭文件
    file.close()
    
    # 创建链表
    linked_list = None
    for word in file_content.split():
        new_node = Node(word)
        
        if linked_list is None:
            linked_list = new_node
        else:
            current = linked_list
            while current.next is not None:
                current = current.next
            current.next = new_node
    
    # 添加空格字符
    current = linked_list
    while current is not None:
        current.data += " "
        current = current.next
    
    # 返回链表
    return linked_list