如何用html写书

原理：利用xml.etree.ElementTree对html进行解析和写入

import xml.etree.ElementTree as ET  # 解析html、xml


def circle():
    print("输入again回到程序开始处，输入exit退出程序")
    tree = ET.parse("book.html")  # 解析文件
    root = tree.getroot()  # 获取根节点
    link_div = root.find("div[@id="link"]")  # 获取link区的div节点。注意find和findall只能查找直接子元素
    body_div = root.find("div[@id="body"]")  # 获取body区的div节点
    h1List = link_div.findall("div")
    count1 = 1
    for i in h1List:  # 列出所有h1标题
        print(str(count1) + "、" + i.find("h1").find("a").text)
        count1 += 1

    def create_h1():  # 创造h1节点
        h1_text = input("输入章节名：")
        if h1_text == "again":
            circle()
        elif h1_text == "exit":
            print("program terminated!")
        else:
            h1_link_div = ET.Element("div")  # 创造节点
            h1_link_h1 = ET.Element("h1")
            h1_link_a = ET.Element("a")
            h1_link_a.text = h1_text
            h1_link_a.set("href", f"#{len(h1List) + 1}")  # 设置a节点的属性
            h1_link_h1.append(h1_link_a)  # 悬挂节点
            h1_link_div.append(h1_link_h1)
            link_div.append(h1_link_div)  # 写入link区
            h1_body_div = ET.Element("div")  # 创造节点
            h1_body_h1 = ET.Element("h1")
            h1_body_h1.text = h1_text
            h1_body_div.set("id", f"{len(h1List) + 1}")
            h1_body_div.append(h1_body_h1)
            body_div.append(h1_body_div)  # 写入body区
            newTree = ET.ElementTree(root)  # root为修改后的root
            newTree.write("book.xml", encoding="utf-8")  # 重新写入xml，进行更新。需要声明编码，否则写入后会乱码
            circle()

    def create_h2():  # 创造h2节点
        h2_text = input("输入章节名：")
        if h2_text == "again":
            circle()
        elif h2_text == "exit":
            print("program terminated!")
        else:
            h2_link_div = ET.Element("div")
            h2_link_h2 = ET.Element("h2")
            h2_link_a = ET.Element("a")
            h2_link_a.text = h2_text
            h2_link_a.set("href", f"#{len(h1List)}_{len(h2List) + 1}")
            h2_link_h2.append(h2_link_a)
            h2_link_div.append(h2_link_h2)
            h1List[int(a) - 1].append(h2_link_div)
            h2_body_div = ET.Element("div")
            h2_body_h2 = ET.Element("h2")
            h2_body_h2.text = h2_text
            h2_body_div.set("id", f"{len(h1List)}_{len(h2List) + 1}")
            h2_body_div.append(h2_body_h2)
            body_div.findall("div")[int(a) - 1].append(h2_body_div)
            newTree = ET.ElementTree(root)
            newTree.write("book.xml", encoding="utf-8")
            circle()

    def create_statement():  # 创造h2下的内容
        p_text = input("输入内容：")
        if p_text == "again":
            circle()
        elif p_text == "exit":
            print("program terminated!")
        else:
            p = ET.Element("p")
            p.text = p_text
            h2.append(p)
            newTree = ET.ElementTree(root)
            newTree.write("book.xml", encoding="utf-8")
            create_statement()

    print("在此处创建输入0
选择章节输入序号")
    a = input("输入：")  # 输入的为字符串而非数字
    if a == "0":
        create_h1()
    else:
        h2List = link_div.findall("div")[int(a) - 1].findall("div")
        count2 = 1
        for i in h2List:  # 列出所有h2标题
            print(str(count2) + "、" + i.find("h2").find("a").text)
            count2 += 1
        print("在此处创建输入0
选择章节输入序号")
        b = input("输入：")
        if b == "0":
            create_h2()
        else:
            h2 = body_div.findall("div")[int(a) - 1].findall("div")[int(b) - 1]  # 选择的h2节点
            pList = h2.findall("p")  # 列出所有h2标题下的内容
            for i in pList:
                print(i.text)
            create_statement()
    tree = ET.ElementTree(root)  # root为修改后的root
    tree.write("book.html", encoding="utf-8")  # 重新写入xml，进行更新。需要声明编码，否则写入后会乱码


circle()  # 循环往复