node_BMeshview.py

def remove_non_updated_objects(self, obj_index, _name):

    meshes = bpy.data.meshes
    objects = bpy.data.objects

    objects_to_reselect = []                    # 1
    for i in bpy.context.selected_objects:
        objects_to_reselect.append(i.name)      # 2
        i.select = False

    objs = [obj for obj in objects if obj.type == 'MESH']
    objs = [obj for obj in objs if obj.name.startswith(_name)]
    objs = [obj.name for obj in objs if int(obj.name.split("_")[-1]) > obj_index]

    # select and finally remove all excess objects
    for object_name in objs:
        objects[object_name].hide_select = False
        objects[object_name].select = True
    bpy.ops.object.delete()

    # delete associated meshes
    for object_name in objs:
        meshes.remove(meshes[object_name])

    # reselect
    for name in objects_to_reselect:            # 3
        bpy.data.objects[name].select = True    # 4

    # fingers crossed. 

This is the behaviour that I wanted. It deselect and reselect the OBJ. Cheers!