When changing data label colors, categories won't show

[emmartin-design]

Hello!

If I set category names to show, without changing anything else, categories show as expected.
chart.plots[0].data_labels.show_category_name = True

However, because I need some data labels to be white, and some to be dark due to the background they appear over, I need to set up code that goes point by point and changes the color. When this is done, the categories will not show. The following is the code I'm currently using to achieve this.

def differing_data_labels(chart, ic, nos, noc):
for series_color, series in enumerate(chart.series):

    for point_color, point in enumerate(series.points):
        pointcolor = point.data_label.font.color
        pointcolor.theme_color = MSO_THEME_COLOR.TEXT_1
        if ic == 'PIE':
            point.data_label.position = XL_LABEL_POSITION.BEST_FIT
            cbreak = colorbreak(noc)
            if point_color < cbreak:
                pointcolor.theme_color = MSO_THEME_COLOR.BACKGROUND_1
            point.data_label.show_category_name = True
        else:
            cbreak = colorbreak(nos)
            if series_color < cbreak:
                pointcolor.theme_color = MSO_THEME_COLOR.BACKGROUND_1

No matter where I place the command to show the categories, if the points have been iterated over, it seems to override the command and no categories will show. In addition, when running the command as part of the iteration seems to have no effect: point.data_label.show_category_name = True

Other such commands, such as show_data_labels, do not have this problem.

[scanny]

Yeah, on some of these finer points PowerPoint can be a bit fussy. At this low level I would create an example of what I want using PowerPoint and then inspect the XML it emits to accomplish that. Then I would compare it with what I'm getting with the python-pptx API and see how they differ.

Then you can address either figuring out how to produce that result with the calls python-pptx gives you or getting as close as you can with python-pptx and setting the last few attributes using lxml methods.