(NOTE - this example is for linux, but can be modified pretty easily for windows)
So lets say you have a file called test_cache.abc located in "/home/userName/alembic_cache/". In the alembic file with have a simple sphere exported, named by default as "pSphere1". The test will look like this:
import imath, alembic archive = alembic.Abc.IArchive('/home/userName/alembic_cache/test_cache.abc') top = archive.getTop() mesh = alembic.AbcGeom.IPolyMesh(top.children, 'pSphereShape1') # Should display <class 'alembic.AbcGeom.IPolyMesh'> print type(mesh) schema = mesh.getSchema() # Should display <class 'alembic.AbcGeom.IPolyMeshSchema'> print type(schema) arb_params = schema.getArbGeomParams() # This should show the extra UVs you exported, and, if you did export the # Vertex colors, those too. print arb_params.getNumProperties() # Assuming you didn't export any colors, and only one extra map: uv_header = arb_params.getPropertyHeader(0) # Lets make sure that it is indeed the right property, so print the name. # Should be the same as the UV map in our file (Note, the one that WASN'T the # active one at the time of export!) print uv_header.getName() v2f_param = alembic.AbcGeom.IV2fGeomParam(arb_params, uv_header.getName()) # Lets make sure that what we got back is indeed what we want! Should be "True" print alembic.AbcGeom.IV2fGeomParam.matches(uv_header) # Now we get the uv sample that containes the values for the UVs and their # indices. uv_sample = v2f_param.getIndexedValue(0) # Should get <class 'alembic.AbcGeom.IV2fGeomParamSample'> print type(uv_sample) uv_values = uv_sample.getVals() uv_indices = uv_sample.getIndices() # Lets make sure that what we got back is what it should be. # Check the type of uv_values: should be <class 'imath.V2fArray'> print type(uv_values) # ...and indices: should be <class 'imath.UnsignedIntArray'> print type(uv_indices) # Now lets check the values: should get something like V2f(0.432955, 0.681514) # Note, the values will obviously be different from mine here... print uv_values # ...and indices: should just be some integer like 3 print uv_indicesThis should get you going and help you test what you exported and see if it worked.
Hope that helps,