[Bf-python] How to export texture coordinates

[Tron Thomas]

I am trying to write an exporter for Blender and having difficulty  
getting proper texture coordinates for mesh geometry.

I created a UV sphere with 8 segments and 8 rings.

I create a material that includes a JPEG texture image

In mesh editing mode for the sphere I created a new UV Texture.

When I render, the sphere shows up with the texture mapped onto it.   
So, it appears that geometry is configure correctly for texturing.

When I try to use the Python API to get texture information, I get an  
getting coordinate information that is incorrect.

When I try to the the uvco value of the vertices for the sphere, the  
values are all zero.

I wrote this script to check the texture coordinates for the faces on  
the sphere:

import Blender

sphere = Blender.Object.GetSelected()[0]

mesh = sphere.getData()

for face in mesh.faces:
	if len(face.uv) == 0:
		continue

	for index in range(0, len(face.v)):
		print "Vertex " + str(face.v[index].index) + " has texture  
coordinates " + str(face.uv[index])


This produces output like:

Vertex 35 has texture coordinates (0.0, 0.0)
Vertex 7 has texture coordinates (1.0, 0.0)
Vertex 6 has texture coordinates (1.0, 1.0)
Vertex 6 has texture coordinates (0.0, 0.0)
Vertex 7 has texture coordinates (1.0, 0.0)
Vertex 8 has texture coordinates (1.0, 1.0)
Vertex 5 has texture coordinates (0.0, 1.0)
...

This does not seem right as not all these vertices should map to  
either 0.0 or 1.0

What is the proper way for someone to get the correct texture  
coordinates for mesh vertices?