[Tutor] Specifying the selected object number in Blender

[Peter Otten]

Marcus Mravik wrote:

> I am trying to specify a number based on what the selected object number
> in the scene is.
> 
> import bpy
> 
> for obj in bpy.context.selected_objects:
> 
>     bpy.context.scene.objects.active = obj
> 
>     bpy.ops.graph.sound_bake(filepath="C:\\Users\\Marcus\\Music\\Don't
>     Just
> Stand There (Instrumental).mp3", low=50*(((WHERE OBJECT NUMBER GOES))),
> high=100+50*(((WHERE OBJECT NUMBER GOES)))
> 
> (((WHERE THE OBJECT NUMBER GOES))) is not part of the script, it's just
> where my question comes from.
> 
> My overall goal is to create a Music Visualizer with Blender and I am
> trying to automate the selection of the object, applying the variable that
> goes up by 50 each time, starting with 0 for the low freq and 50 for the
> high freq. And ending with 7950 low and 8000 high.

If "object number" is not a blender-specific term and just 0 for the first, 
1 for the second, and 2 for the third object in selected_objects:

for index, obj, in enumerate(bpy.context.selected_objects):
    bpy.context.scene.objects.active = obj
    bpy.ops.graph.sound_bake(
        filepath="C:\\Users\\Marcus\\Music\\Don't "
                 "Just Stand There (Instrumental).mp3",
        low = index * 50,
        high = (index + 1) * 50)