Hi.! 

I want to change order of objects

How can I change the order of objects?

When I add an svg-size,100% height and 100% width, rectangle to an existing svg file, it covers them all.

I want to send this rectangle object to the bottom.

How can i do this ?

selection_list = self.svg.selected
if len(selection_list) < 1:
    inkex.errormsg('nothing selected')
    return
from inkex import Rectangle

canvas_bbox = self.svg.get_page_bbox()

background_rect = Rectangle()

background_rect.set('x', canvas_bbox.left)
background_rect.set('y', canvas_bbox.top)
background_rect.set('width', canvas_bbox.width)
background_rect.set('height', canvas_bbox.height)
background_rect.set('fill', 'green')

rendering_order_list = selection_list.rendering_order()

inkex.errormsg(len(rendering_order_list))

rendering_order_list[0].addprevious(background_rect)

hi inklinea,

thanks for your codes.

I tried your code, it works, but I need to select objects in your code.

I should have written in the beginning, but I forgot to write it. I'm sorry, it's my fault.

I want to do this without selecting it.

I have many objects, groups and rectangle objects in my .svg document. I want to post all below of my rectantangle. So what I'm actually going to do is have a rectangular background.

But as I wrote, there are too many different objects in svg. So many of my attempts have failed.

In that case:

For the svg - something as simple as:

svg_children = self.svg.getchildren()
svg_children[0].addprevious(background_rect)

or for the current layer:

current_layer_children = self.svg.get_current_layer().getchildren()
if current_layer_children:
    current_layer_children[0].addprevious(background_rect)
else:
    self.svg.get_current_layer().append(background_rect)

You can use the [0].addprevious(background_rect) for an element list I suppose.

Thank you very much inklinea,

The code you gave really helped me a lot.

The extension now works exactly as I want it to.

You are super hero , thanks again.