html转json

将HTML转换为JSON需要进行多步处理，以下是其中的一种实现方法：

1. 使用DOM解析器将HTML转换为DOM对象
2. 遍历DOM树，将每个节点转换为JSON对象
3. 将JSON对象序列化为字符串

下面是一个示例代码，可以将HTML字符串转换为JSON字符串：

from xml.dom import minidom
import json

def parse_node(node):
    result = {}
    result['tag'] = node.tagName.lower()
    if node.hasAttributes():
        attrs = {}
        for name, value in node.attributes.items():
            attrs[name.lower()] = value
        result['attrs'] = attrs
    if node.hasChildNodes():
        children = []
        for child in node.childNodes:
            if child.nodeType == minidom.Node.TEXT_NODE:
                children.append(child.nodeValue.strip())
            elif child.nodeType == minidom.Node.ELEMENT_NODE:
                children.append(parse_node(child))
        result['children'] = children
    return result

def html_to_json(html):
    doc = minidom.parseString(html)
    return json.dumps(parse_node(doc.documentElement))

# 测试
html = '<div class="container"><h1>Hello, world!</h1><p>This is a paragraph.</p></div>'
json_str = html_to_json(html)
print(json_str)

输出结果为：

{
  "tag": "div",
  "attrs": {
    "class": "container"
  },
  "children": [
    {
      "tag": "h1",
      "children": [
        "Hello, world!"
      ]
    },
    {
      "tag": "p",
      "children": [
        "This is a paragraph."
      ]
    }
  ]
}