Batch rename a .Blend file after the first object or mesh name in the file

Question

After a data crash I have a couple of thousand files like this "f1288357332.blend". I'm not good at python but there must be a way to rename those files as batch after the Object or mesh name in the file. i got the code to rename after the material but not for the object or mesh name. And now i found out there are not only materials in the blend files.

import bpy
import os

filepath = bpy.data.filepath
basepath, filename = os.path.split(filepath)
newpath = os.path.join(basepath, "generated")
os.makedirs(newpath,  exist_ok=True)

new_filename = ''

and iam a absolut beginner in python - someone here wrote the script Here is the my question for rename the script after material:

Batch-Rename-File-after-Material-Slot

import bpy
import os
import glob
from subprocess import call

BLEND_FILES_DIRECTORY = r"/path/to/your/blend/files" #example path: C:\Users\xxxx\Desktop\blendfiles
RENAME_SCRIPT = r"/path/to/rename-script.py" #example path: C:\Users\xxxx\Desktop\blendfiles\rename-script.py

for file in glob.glob(os.path.join(BLEND_FILES_DIRECTORY, '*.blend')):
    basepath, filename = os.path.split(file) 
    print("process file:", filename)
    call(['blender','-b', file, '-P', RENAME_SCRIPT]) 

That is the code for rename after the material but i need this to rename after the object file now. Can somebody help me?

Answer 1

import bpy
import os

filepath = bpy.data.filepath
basepath, filename = os.path.split(filepath)
newpath = os.path.join(basepath, "generated")
os.makedirs(newpath,  exist_ok=True)

new_filename = ''

for o in bpy.data.objects:
    if o.type != 'MESH':
        continue
    new_filename = os.path.join(newpath, o.name + ".blend")
    bpy.ops.wm.save_as_mainfile(filepath=new_filename)
    break

if new_filename == '':
    print(filepath, ": Warning no mesh found!")