Portrait to Landscape (Resolution Preset)

[Macbeth R.]

I'm trying to make a portrait resolution preset via python, but for some reason if a execute this little script line by line it works,

but if I try to execute all as a script, the last line, the one that changes pixel aspect, doesn't work, is not being changed to 1.

cmds.setAttr("defaultResolution.aspectLock", 0)

cmds.setAttr("defaultResolution.width", 720)

cmds.setAttr("defaultResolution.height", 1280)

cmds.setAttr("defaultResolution.aspectLock", 1)

cmds.setAttr("defaultResolution.pixelAspect", 1)

I already try without luck:
- time.sleep(1), wait one second between commands.

- cmds.evalDeferred()

- maya.utils.executeDeferred()

- put it inside a function

Any ideas why this could happen?? or workarounds for this?

Thanks!