The best thing to do is to use Excel to create what you want and look at the XML of the chart. Openpyxl lets you use most of this, though for the sake of simplicity the API is not 1:1 that of the specification.
Axes are odd things. You probably want to look at spPr and txPr in EG_AxShared. If you can find what you need, you can use the fromstring()
trick to copy some existing rather than creating manually, element for element.
Charlie
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Charlie Clark
Managing Director
Clark Consulting & Research
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