CODEWITHSUNDEEP
pythonpython-pptx
David Zemens
David Zemens

Reputation: 53663

Changing series fill color in python-pptx

I just started using python-pptx, but have somewhat extensive experience working with Powerpoint between win32com, Visual Basic, Interop, etc., and I am seeing something funny when creating a chart with a single series.

Problem: a chart with a single series, by default, appears to be varying color fill per point/category. This is in contrast to what I'd expect: all points within a series should have the same color. (e.g., with win32com, these charts would have a single, consistent color across all points, buuuut there's some very finnicky stuff with win32com that requires basically rebuilding the ChartData and overwriting the default, plus the whole Application instance is doing its thing behind the scenes, which we don't have in OpenXML or pptx, etc, so that might be a factor in this apparent discrepancy)

enter image description here

Question: Is this the normal/expected behavior for a chart with a single series? Or am I overlooking something obvious?

I saw a similar question and I was able to adapt your comments there to format the series consistently (below), but mainly I am wondering if this is necessary, or if I'm doing something wrong:

def FormatChart(chart):
    plot = chart.plots[0]
    plot.has_data_labels = True
    dl = plot.data_labels
    dl.position = XL_LABEL_POSITION.OUTSIDE_END

    value_axis = chart.value_axis
    value_axis.has_major_gridlines = False

    s = plot.series[0]
    s.format.fill.solid()
    s.format.fill.fore_color.theme_color = MSO_THEME_COLOR_INDEX.ACCENT_1

Upvotes: 1

Views: 963

Answers (1)

scanny
scanny

Reputation: 29021

This is the expected behavior. The easy way to change it is by setting the _BasePlot.vary_by_categories property to False:

plot = chart.plots[0]
plot.vary_by_categories = False

Upvotes: 2

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