Viewtypes in a radial menu

[noc2]

Hi;

I'm trying to create a radial menu that I can use to change the viewtype of the current viewport, but for the life of me, I just couldn't 

I tried this but just couldn't find the appropriate radialmenu command for it:

radialmenu.setviewportType(kwargs, hou.geometryViewportType.Perspective, 1)

I just couldn't figure out what the appropriate radial menu command for this could be, radialmanu.setviewportType() seems invalid…

Any help would be highly appreciated.

Cheers;

AJ