[Bf-python] Mesh.Obj i/o

[Campbell Barton]

Ken, is it possible to have Mesh working for Blender 2.41 next week?
I have moved both obj import and export to Mesh and remaining issue is 
with face extending.
Issue is as before- breating faces.
PFace would be be okay, or extra parametres in extend as discussed.

Also, would be be hard to have faces UV accept a list as well as a 
tuple? Lists are much faster for stansforming UV's with List Comprehension.

eg

for f in me.faces:
  f.uv = [uv*2 for uv in f.uv]

# Rather then
for f in me.faces:
  f.uv = tuple([uv*2 for uv in f.uv])

- not a bug deal but if you do a lot of uv coord manipulation you end up 
with lots of tuples() around LC's.
maybe document that assigning a list wont make uv's share the list object -

- Cam

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Campbell J Barton

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