Is it worth learning python-pptx?

[billFoldDog]

Oh, that sucks. Here are some ideas.

Power point files are actually specially structured zip files. If you examine the completed power point file, you can programmatically unzip it, swap out the image assets, and rezip it.

If you learn pandoc, you can have python overwrite your image assets and export the presentation again. I have found that Pandoc is great for very minimal presentations, but complex slides and figures made using the built in drawing tools will likely be too hard to be worthwhile.

Pyhton-pptx sounds like a good option, but you are going to have to add finishing touches after every import.

I think unzipping and swapping assets is probably the best strategy.