Method _get_style_id_from_style

src/docx/styles/styles.py:127–136

Id of `style`, or |None| if it is the default style of `style_type`. Raises |ValueError| if style is not of `style_type`.

(self, style: BaseStyle, style_type: WD_STYLE_TYPE)

        return self._get_style_id_from_style(self[style_name], style_type)

    def _get_style_id_from_style(self, style: BaseStyle, style_type: WD_STYLE_TYPE) -> str | None:
        """Id of `style`, or |None| if it is the default style of `style_type`.

        Raises |ValueError| if style is not of `style_type`.
        """
        if style.type != style_type:
            raise ValueError("assigned style is type %s, need type %s" % (style.type, style_type))
        if style == self.default(style_type):
            return None
        return style.style_id