batch

Software:
Blender 2.8 | Python 3.7

Some useful short Python snippets for batch re-naming objects in Blender:

1. Remove last 4 characters from selected object names:

   import bpy
   objects = bpy.context.selected_objects
   for o in objects:
       o.name = o.name[:-4]

   

2. Rename all selected objects to a set base name followed by a 3 digit numeric suffix:

   import bpy
   objects = bpy.context.selected_objects
   for (i,o) in enumerate(objects):
        o.name = "some_base_name_{:03d}".format(i)

   

3. Prefix all selected objects name with their Blender data type like renaming “SomeModel” to “MESH_SomeModel” or for example:

   import bpy
   objects = bpy.context.selected_objects
   for (i,o) in enumerate(objects):
        o.name = "{}_{}".format(o.type,o.name)

   

* note that when copying and pasting a script from this example, the indentation may not be pasted correctly.

Note:
Blender 2.8 has a robust batch renaming utility that is invoked by pressing Ctrl + F2 so we don’t have to write scripts to do batch renaming of objects:

Related:
Python for Blender – Accessing Mesh Triangles