[Bf-python] Inserting a slice into RenderPass.rect

[Brian Savery]

Working on a RenderEngine addon.   When rendering I'd like to update a
region of the render result (say if I want to update the first scanline of
pixels).

On the face of it RenderPass.rect is simply a list of 4 float items (list
of rgba value).
https://www.blender.org/api/blender_python_api_current/bpy.types.RenderEngine.html

I can do
layer.rect = [[1.0, 0.0, 0.0, 1.0]] * pixel_count

However replacing a slice of that rect:
layer.rect[100:200] = [[1.0, 0.0, 0.0, 1.0]] * 100
gives an error:

TypeError: a float is required
Not sure what's going on here?

-- 
brian.savery at gmail.com
508-274-8700
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