Find scales url in tal

1

Is it possible to find the url of an image scale of an image in TAL ?

I need the url itself (not the tag), so basically I want:

/path/to/image/@@images/5a76148b-bee5-4e23-98de-0d4d7404a9b3.jpeg

2 
<img tal:define="scales context/@@images;
             thumbnail python: scales.scale('image', width=64, height=64);"
 tal:condition="thumbnail"
 tal:attributes="src thumbnail/url;
                 width thumbnail/width;
                 height thumbnail/height" />
3

Thanks