ENH: th elements from Styler need the row scope

[reteps]

Feature Type

• Adding new functionality to pandas

• Changing existing functionality in pandas

• Removing existing functionality in pandas

Problem Description

Currently, the pandas Styler API can be used to create a HTML table from a dataframe. However, the tables it generates are not accessible: it fails WCAG/H63.

Feature Description

Ensure the output generated by Styler is accessible.

• th with class row_heading needs the row scope

I use the current workaround to add this rule myself:

    html_root = lxml.html.fromstring(frame_style.to_html())
    for th in html_root.xpath("//th[contains(@class, 'row_heading')]"):
        th.set("scope", "row")

Alternative Solutions

• Make the styler API more flexible for adding attributes. Currently, set_td_classes and set_table_styles aren't flexible enough for this, and set_table_attributes can't set attributes on th elements themselves.

Additional Context

No response

[reteps]

Closing in favor of https://gitlab.com/html-validate/html-validate/-/issues/303.