使用Python（BeautifulSoup？）将ID标记添加到HTML标记中

我有一个包含特定标记的HTML文件，我需要以

ID=“rule\u 1”

，

ID=“rule\u 1.1”

，

ID=“rule\u 1.2”

，

ID=“rule\u 1.2.1”

等格式向每个标记添加ID号。例如，当前的HTML是：

<div style="styles">
    <p class="classname">TEXT</p>
    <p class="classname">TEXT</p>
    <ul style="styles">
        <li>
            <p class="classname">TEXT</p>
        </li>
        <li>
            <p class="classname">TEXT</p>
        </li>
    </ul>
</div>

---

但这只是添加了

id=“1”

，

id=“2”

，等等。我怎样才能让它像

1

、

1.1

、

1.1.1

这样交错排列

没关系，我想出来了：

curr_tags = {}

for each_tag in html_tags:
    if html_tags.index(each_tag) == 0:
        each_tag.attrs['id'] = 'rule_1'
    else:
        parent_id = each_tag.parent.attrs['id']
        if parent_id in curr_tags.keys():
            curr_tags[parent_id] += 1
        else:
            curr_tags[parent_id] = 1
        each_tag.attrs['id'] = parent_id + '.{0}'.format(curr_tags[parent_id])

from bs4 import BeautifulSoup as html_parser

with open('outputs/HTML/{}.html'.format(deal), 'r') as read_file:
    html_source = read_file.read()

soup = html_parser(html_source, 'html.parser')
html_tags = soup.find_all(['div', 'p', 'span', 'ul', 'li'])

for each_tag in html_tags:
    each_tag.attrs['id'] = html_tags.index(each_tag)

with open('outputs/HTML/{}-id.html'.format(deal), 'w') as save_file:
    save_file.write(str(soup))

curr_tags = {}

for each_tag in html_tags:
    if html_tags.index(each_tag) == 0:
        each_tag.attrs['id'] = 'rule_1'
    else:
        parent_id = each_tag.parent.attrs['id']
        if parent_id in curr_tags.keys():
            curr_tags[parent_id] += 1
        else:
            curr_tags[parent_id] = 1
        each_tag.attrs['id'] = parent_id + '.{0}'.format(curr_tags[parent_id])