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Description
Paragraph.insert_paragraph_before() lets you treat a Paragraph as a cursor to insert a new paragraph relative to another. Run doesn't provide an equivalent, e.g., Run.insert_run_before(), but should. This, combined with Paragraph.add_run(), would support adding runs anywhere.
In my app, I'm searching for particular runs. Those that match, I need to split into two for formatting, but that requires the insert feature described above. Mentioning this on python-docx led to this reply, which looks like a good overview of what's required.