When creating a new powerpoint slide with a line chart on it, I keep getting a chart title even though I didn't ask for one. I have tried all sorts of ways to get rid of it using combinations of chart.has_title=False or chart.has_text_frame = False and nothing seemed to work.
I looked at the diff between the xml when the chart was working well and now when it display this unwanted title. Among other things, there was this <c:autoTitleDeleted val="0"/> property. In the python-pptx chart.xmlwriter source code itself I changed the value to 1 and the chart title disappeared so I assume this is the root cause of this unwanted title–I have no idea why the autoTitleDeleted element is now being added to the xml from python-pptx.
I also saw this issue https://github.com/scanny/python-pptx/issues/460, but when I try to implement the fix I get the following error:
autoTitleDeleted = chart_element.get_or_add_autoTitleDeleted()
AttributeError: 'CT_Chart' object has no attribute 'get_or_add_autoTitleDeleted'
And I can't find in the docs anywhere a get_or_add_audoTitleDeleted method nor in the source code.
I also tried changing the xml manually by simply doing this:
chart._element.xml = xml.replace('autoTitleDeleted val="0', 'autoTitleDeleted val="1')
But I get a AttributeError: can't set attribute
So I have 3 questions:
1) How can I resolve this?
2) For the future, when I find the xml causing an issue, how can I manually change it? Is there a library somewhere for xml manipulation?
3) Why is this autoTitleDeleted element being added in the first place?
