Underlining a portion of the text in a cell

[srob3]

In Excel VBA, if I have text in the cell referenced by the range object r, I can do:

r.Characters(1, 10).Font.Underline = True

to underline just the first 10 characters of the text.

r.api.Characters(1, 10).Font.Underline = True

produces the error:

builtins.TypeError: 'Characters' object is not callable

I have tried many many different approaches but cannot figure out how to underline partial text with xlwings.

Can someone please explain how to do this.

[gepcel]

Maybe trying r.characters[1:10].api.Font.Underline = True