export_fbx_bin.py

            print('\nBatch exporting %s as...\n\t%r' % (data, filepath))

            if batch_mode == 'GROUP':  # group
                # group, so objects update properly, add a dummy scene.
                scene = bpy.data.scenes.new(name="FBX_Temp")
                scene.layers = [True] * 20
                # bpy.data.scenes.active = scene # XXX, cant switch
                src_scenes = {}  # Count how much each 'source' scenes are used.
                for ob_base in data.objects:
                    for src_sce in ob_base.users_scene:
                        if src_sce not in src_scenes:
                            src_scenes[src_sce] = 0
                        src_scenes[src_sce] += 1
                    scene.objects.link(ob_base)

                # Find the 'most used' source scene, and use its unit settings. This is somewhat weak, but should work
                # fine in most cases, and avoids stupid issues like T41931.
                best_src_scene = None
                best_src_scene_users = 0
                for sce, nbr_users in src_scenes.items():
                    if (nbr_users) > best_src_scene_users:
                        best_src_scene_users = nbr_users
                        best_src_scene = sce
                scene.unit_settings.system = best_src_scene.unit_settings.system
                scene.unit_settings.system_rotation = best_src_scene.unit_settings.system_rotation
                scene.unit_settings.scale_length = best_src_scene.unit_settings.scale_length

                scene.update()
                # TODO - BUMMER! Armatures not in the group wont animate the mesh
            else:
                scene = data

            kwargs_batch = kwargs.copy()
            kwargs_batch["context_objects"] = data.objects

            save_single(operator, scene, filepath, **kwargs_batch)

            if batch_mode == 'GROUP':
                # remove temp group scene
                bpy.data.scenes.remove(scene)

        # no active scene changing!
        # bpy.data.scenes.active = orig_sce

        ret = {'FINISHED'}  # so the script wont run after we have batch exported.

    if context.active_object and org_mode and bpy.ops.object.mode_set.poll():
        bpy.ops.object.mode_set(mode=org_mode)

    return ret