Rotating and Scaling ObData

Hello Blender Artist,
my python script reads out a file with coordinates for vertices, which are then added to the mech with me.verts.extend(list). After that an Object is linked and scaled and rotated to fit in the camera view. To make the vertices visible for rendering I tried to place small cubes on every vertex of the Object. But when the vertices of the Object are extracted with
mesh0 = ob.getData(mesh=1)
for vert in mesh0.verts: …
it returns the pure vertices of the import, not the scaled and rotated ones. It seems like the rotating of the Object doesnt effect the Obdata, which looks weird in my blender proj, where the cube structure is build far away from the mesh I actually extract the vertices from.