Q:

How do I select one specific image on the current slide in the current Keynote document? 

Using AppleScript, I want to alter the x and y position of a particular image on every slide of a Keynote document.  Once Keynote is running and activated, the following code works...
tell the front document
   set the current slide to slide 1
   tell the current slide
      set thisImage to image 1
      set position of thisImage to {10,10}
   end tell -- current slide
end tell -- front document

... but it's too fragile.  If my image is not the first one ("image 1") then I'll be changing the position of the wrong object.  I can't find anything in the scripting dictionaries or in on-line examples about expressing an object specifier for a particular image.  I tried several variations on things like...
set thisImage to image with file name "my-file.png"

... to no avail.  Any and all advice is appreciated.  Thanks! 

A:

This works in Keynote 8.2, but to be honest, I'm not sure why. 
set thisImage to image {name:"my-file.png"}

However, if you want to then ask thisImage what its name is, you have to ask for its file name, e.g.…
file name of thisImage

Every time I use any presentation software, I somehow like them all less. 
You have some redundancy (around 'current slide') so here is my take: 
tell slide 1 of the front document
    set thisImage to image {name:"my-file.png"}
    set position of thisImage to {10, 10}
end tell

Finally, since your objective is to cycle through every slide in the deck, you could try this: 
tell front document
    repeat with i from 1 to count of slides

        tell slide i to set position of image {name:"my-file.png"} to {10, 10}

    end repeat
end tell

