3D Rendering example fails on Python3

The 3D Rendering example wiorks on Kivy 1.8 under Python 2.7, but fails on Kivy 1.8 under Python 3.3.
C:\Users\ben\Projects\kivy\examples\3Drendering>python main.py
[INFO              ] Kivy v1.8.0
[INFO              ] [Logger      ] Record log in C:\Users\ben\.kivy\logs\kivy_1
4-03-18_1.txt
[INFO              ] [Factory     ] 157 symbols loaded
[DEBUG             ] [Cache       ] register <kv.lang> with limit=None, timeout=
Nones
[DEBUG             ] [Cache       ] register <kv.image> with limit=None, timeout
=60s
[DEBUG             ] [Cache       ] register <kv.atlas> with limit=None, timeout
=Nones
[INFO              ] [Image       ] Providers: img_tex, img_dds, img_pygame, img
_gif (img_pil ignored)
[DEBUG             ] [Cache       ] register <kv.texture> with limit=1000, timeo
ut=60s
[DEBUG             ] [Cache       ] register <kv.shader> with limit=1000, timeou
t=3600s
[DEBUG             ] [Window      ] Ignored <egl_rpi> (import error)
[INFO              ] [Window      ] Provider: pygame(['window_egl_rpi'] ignored)

[DEBUG             ] [Window      ] Display driver windib
[DEBUG             ] [Window      ] Actual window size: 800x600
[DEBUG             ] [Window      ] Actual color bits r8 g8 b8 a8
[DEBUG             ] [Window      ] Actual depth bits: 24
[DEBUG             ] [Window      ] Actual stencil bits: 8
[DEBUG             ] [Window      ] Actual multisampling samples: 4
GLEW initialization succeeded
[INFO              ] [GL          ] OpenGL version <b'4.0.0 - Build 9.17.10.2932
'>
[INFO              ] [GL          ] OpenGL vendor <b'Intel'>
[INFO              ] [GL          ] OpenGL renderer <b'Intel(R) HD Graphics 2500
'>
[INFO              ] [GL          ] OpenGL parsed version: 4, 0
[INFO              ] [GL          ] Shading version <b'4.00 - Build 9.17.10.2932
'>
[INFO              ] [GL          ] Texture max size <8192>
[INFO              ] [GL          ] Texture max units <16>
[INFO              ] [Shader      ] fragment shader: <No errors.>
[DEBUG             ] [Shader      ] Fragment compiled successfully
[INFO              ] [Shader      ] vertex shader: <No errors.>
[DEBUG             ] [Shader      ] Vertex compiled successfully
[INFO              ] [Shader      ] program: <No errors.>
[DEBUG             ] [ImagePygame ] Load <C:\Kivy-1.8.0-py3.3-win32\kivy\kivy\da
ta\glsl\default.png>
[INFO              ] [Window      ] virtual keyboard not allowed, single mode, n
ot docked
[DEBUG             ] [App         ] Loading kv <.\renderer.kv>
[DEBUG             ] [App         ] kv <.\renderer.kv> not found
[INFO              ] [Shader      ] program: <No errors.>
[INFO              ] [Shader      ] Read <simple.glsl>
[INFO              ] [Shader      ] vertex shader: <No errors.>
[DEBUG             ] [Shader      ] Vertex compiled successfully
[INFO              ] [Shader      ] fragment shader: <No errors.>
[DEBUG             ] [Shader      ] Fragment compiled successfully
[INFO              ] [Shader      ] program: <No errors.>
 Traceback (most recent call last):
   File "main.py", line 61, in <module>
     RendererApp().run()
   File "C:\Kivy-1.8.0-py3.3-win32\kivy\kivy\app.py", line 766, in run
     root = self.build()
   File "main.py", line 58, in build
     return Renderer()
   File "main.py", line 16, in __init__
     self.scene = ObjFile(resource_find("monkey.obj"))
   File "C:\Users\ben\Projects\kivy\examples\3Drendering\objloader.py", line 126
, in __init__
     self.finish_object()
   File "C:\Users\ben\Projects\kivy\examples\3Drendering\objloader.py", line 64,
 in finish_object
     data = [v[0], v[1], v[2], n[0], n[1], n[2], t[0], t[1]]
 TypeError: 'map' object is not subscriptable
kivy / kivy

3D Rendering example fails on Python3 #1977
