Generate a presentation, MyPicturePresentation, that you then use as the template presentation for another presentation. MyPicturePresentation has one slide with one picture.

import mlreportgen.ppt.*
ppt = Presentation("MyPicturePresentation");
open(ppt);
slide1 = add(ppt,"Title and Picture");
replace(slide1,"Title","Street");
replace(slide1,"Picture",Picture("street1.jpg"));

Close and view the presentation.

close(ppt);
rptview(ppt);

Create a presentation, MyNewPicturePresentation, from MyPicturePresentation. MyPicturePresentation is the template presentation for MyNewPicturePresentation,

ppt = Presentation("MyNewPicturePresentation","MyPicturePresentation");
open(ppt);

Find the template picture by using the find method of the slide object. Because the picture comes from a template presentation slide, find returns the picture as an mlreportgen.ppt.TemplatePicture object.

slide1 = ppt.Children(1);
templatePictureObj = find(slide1,"Picture") 

templatePictureObj = 
  TemplatePicture with properties:

    XMLMarkup: '<p:pic><p:nvPicPr><p:cNvPr id="8" name="Picture"/><p:cNvPicPr><a:picLocks noChangeAspect="1" noGrp="1"/></p:cNvPicPr><p:nvPr><p:ph idx="13" sz="quarter" type="pic"/></p:nvPr></p:nvPicPr><p:blipFill><a:blip r:embed="rId2"/><a:stretch><a:fillRect/></a:stretch></p:blipFill><p:spPr/></p:pic>'
         Name: 'Picture'
            X: []
            Y: []
        Width: []
       Height: []
        Style: []
     Children: []
       Parent: [1×1 mlreportgen.ppt.Slide]
          Tag: 'ppt.TemplatePicture:1360:550'
           Id: '1360:550'

Replace the picture with a different picture.

street2 = Picture("street2.jpg");
replace(templatePictureObj,street2);

Close and view the presentation.

close(ppt);
rptview(ppt);