set active scene with python

Coding Python Support
1

hi everyone

probably i have a very simple problem, but didn’t find a solution so far. So I hope you can help me.

How can i set the active scene with python?

In my python script i link a new scene into my blender file. This works so far, but it does not set it as active scene.

Thanks for help
Thomas

2

not certain cause did not have time to test this

but try this

bpy.data.screens[‘Default’].scene = bpy.data.scenes[‘Scene’]
bpy.context.screen.scene=bpy.data.scenes[‘Scene’]
let me know if it works ok

3

both of your ways work perfectly for me.

Thank you so much!

4

Hi Everybody,

sorry for rising this question again. The solution above works fine to change the scen.

BUT i have not found any way to make the python script actually work on the scene were it changed to.
This scrip part should:
1 Step) change from any current scene (for exampe Scene.001) to the scene named “Scene”.
2.Step) render the scene were it change to. In this case “Scene”

#*************
import bpy

def scene_change():
bpy.data.screens[‘Default’].scene = bpy.data.scenes[‘Scene’]
bpy.context.screen.scene=bpy.data.scenes[‘Scene’]
print(bpy.context.scene)

def render_scene():
bpy.ops.render.render()

scene_change()
render_scene()
#********************

for some reason this example first render the wrong scene (scene.001) and then changes to the scene i wanted to go.
is there a way to render a scene without making it current before?

Thanks for help!

5

I’d like to second this request - I’m having the same problem. brino, did you ever figure out a solution?

Thanks!

6

To clarify: I’m looking to do the exact same thing as brino, to render multiple scenes in a .blend file via python. So I need to change the scene, and then call bpy.ops.render.render(), but the render call doesn’t work on the new (second) scene - it just renders the first scene again and again.

I found a strange behavior that may be related to this problem: When I change scenes from “Scene1” to “Scene2” by calling

bpy.context.screen.scene = bpy.data.scenes[‘Scene2’]

… and then check on the other screens’ scenes via

for scr in bpy.data.screens:
print(scr.scene.name)

… the other screens (for example, the modeling screen, or the compositing screen) have not changed over to the new scene. The same thing happens if I switch screens via the GUI - for example, if I change from “Scene1” to “Scene2” while in the modeling screen, and then I switch to the compositing screen, Blender will switch back to “Scene1” on me.

I tried to set all the screens to the same scene using a for loop:

for scr in bpy.data.screens:
scr.scene = bpy.data.scenes[‘Scene2’]

… but it did not work. When I checked the screens later with:

for scr in bpy.data.screens:
print(scr.scene.name)

… only the active screen had changed to the new scene. It seems to me that ALL the screens should always be associated with the same (active) scene - is this a bug in the API? Any chance of a fix? Or is there anything else I can do?

THANKS for your help…

1 Like
7

I came across the same issue here, my solution was to call the scene from the render operator as below

bpy.ops.render.render(scene=‘SCENE NAME’)

worked like a charm, for my purposes at least