Build html with python

html.py

class Element:
    tag = None

    def __init__(self, *elements, **attrs):
        self.elements = elements
        self.attrs = attrs
        
        assert self.tag is not None, "Set tag property!"

    def html(self):
        attrs = []
        for k, v in self.attrs.items():
            attrs.append(f'{k}="{v}"')
        attrs = " ".join(attrs)

        if attrs:
            html = f"<{self.tag} {attrs}>"
        else:
            html = f"<{self.tag}>"

        for element in self.elements:
            if isinstance(element, Element):
                text = element.html()
            else:
                text = str(element)
            html += text

        html += f"</{self.tag}>"
        return html

    def __str__(self):
        return self.html()


class Td(Element):
    tag = "td"


class Th(Element):
    tag = "th"


class Tr(Element):
    tag = "tr"


class Table(Element):
    tag = "table"


class P(Element):
    tag = "p"


class Div(Element):
    tag = "div"


elem = Div(
    P("Hello, World!"),
    Table(
        Tr(Th("Text 1", colspan="2")),
        Tr(Td("Id"), Td("Name")),
        Tr(Td("1"), Td("Item 1")),
        Tr(Td("2"), Td("Item 2")),
    ),
    Table(
        Tr(Th("Text 2", colspan="2")),
        Tr(Td("Id"), Td("Name")),
        Tr(Td("1"), Td("Item 1")),
    ),
    Table(
        Tr(Th("Text 3", colspan="2")),
        Tr(Td("Id"), Td("Name")),
        Tr(Td("1"), Td("Item 1")),
        Tr(Td("2"), Td("Item 2")),
    ),
)

print(elem.html())