traitsui_html_view.py

from traits.api import HTML, HasStrictTraits
from traitsui.api import UItem, View


class Test(HasStrictTraits):
    html = HTML
    traits_view = View(UItem('html'))

    def _html_default(self):
        return """
            <table>
                <tr><th>A</th><th>B</th><th>C</th></tr>
                <tr><td>1</td><td>2</td><td>3</td></tr>
            </table>
        """

Test().configure_traits()