Reading/writing PowerPoint comment

[Auro48]

I am trying to write comments for some text-boxes inside a power point slide.
Is there any python-pptx attribute to do the same ?
Also if there is already a comment present, then how to read that comment.

[dhdaines]

See also #756. Schema described here: https://ooxml.info/docs/13/13.3/13.3.2/

A comment will have a relationship of type http://schemas.microsoft.com/office/2018/10/relationships/comments pointing to a part which will look something like this:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<p188:cmLst xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:p188="http://schemas.microsoft.com/office/powerpoint/2018/8/main">
  <p188:cm id="{B50C790A-37B3-444C-B515-2CF1F0093CA0}" authorId="{0DC68A9A-3FB8-5F6F-7EC4-260D448374F4}" created="2025-10-07T14:18:24.217">
    <ac:txMkLst xmlns:ac="http://schemas.microsoft.com/office/drawing/2013/main/command">
      <pc:docMk xmlns:pc="http://schemas.microsoft.com/office/powerpoint/2013/main/command"/>
      <pc:sldMk xmlns:pc="http://schemas.microsoft.com/office/powerpoint/2013/main/command" cId="109857222" sldId="256"/>
      <ac:spMk id="3" creationId="{00000000-0000-0000-0000-000000000000}"/>
      <ac:txMk cp="97" len="110">
        <ac:context len="213" hash="1573981104"/>
      </ac:txMk>
    </ac:txMkLst>
    <p188:pos x="7096125" y="438150"/>
    <p188:txBody>
      <a:bodyPr/>
      <a:lstStyle/>
      <a:p>
        <a:r>
          <a:rPr lang="en-US"/>
          <a:t>HELLO WORLD!!!</a:t>
        </a:r>
      </a:p>
    </p188:txBody>
  </p188:cm>
</p188:cmLst>

[dhdaines]

Actually there are multiple different schemas possible for comments (because Microsoft, that's why). The one above seems to be specific to Office 365, and the one on ooxml.info is... not the same. But there is also another one from 2006. So, supporting comments is really not at all straightforward which is probably why nobody as done it yet :)

[dhdaines]

As a first approximation you can look for the following relations from a slide part:

• http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments
• https://schemas.microsoft.com/office/2018/10/relationships/comments
• http://purl.oclc.org/ooxml/officeDocument/relationships/comments

And then just scrape all the text out of them...