Script to see objects inside a .blend file

Coding Python Support
1

Is there a way to browse all the objects inside a .blend file in the 2.55 API? I would like to know what all the objects are in an arbitrary .blend file so I can add all of them to a scene using bpy.ops.wm.link_append(). This function requires knowing the name of whatever object is being added, it won’t just add everything in the .blend file automatically.

2

Idea:
write a script to export the names of all objects of the blend, from which you would like to append …,
(bpy.data.objects[:], type name etc.) to a textfile.

Then in the working blend import the info from the text and use what you need?

T

3

Good idea, I can run Blender in background mode on…

blender.exe -b file1.blend -P exportScript.py
blender.exe -b file2.blend -P exportScript.py
blender.exe -b file3.blend -P exportScript.py
…
blender.exe -b fileN.blend -P exportScript.py

Then run the main scene file with

blender.exe -b mainscene.blend -P mainScript.py

Thanks a lot.

4

Ahh, now I see, how you use it, can even be set into a ‘batch-file’ :wink:

Maybe you can ‘give’ us exportScript.py (being lazy).

5

Yes, here is the script in three parts:

main.py:


import os

BlenderPath = 'C:\Blender2.55\blender.exe'
scene_file = 'C:\scene.blend'
model_files = ['C:\model1.blend', 'C:\model2.blend', 'C:\model3.blend']

for i in model_files:
   os.spawnl(os.P_WAIT, BlenderPath, BlenderPath, " -b " + i + " -P exportscript.py"

os.spawnl(os.P_WAIT, BlenderPath, BlenderPath, " -b " + scene_file + " -t 8 -P scenescript.py"

exportscript.py:


import bpy

f = open('C://scene_info.tmp', 'a')
f.write(bpy.data.filepath)
f.write(" ")
objs = bpy.data.objects
for i in objs:
    if (i.type == 'MESH'):
        f.write(i.name)
        f.write(" ")

f.write("
")
f.close()

scenescript.py:


import bpy

def add_objects(){
        F = open("C://scene_info.tmp", "r")
        text = F.read()
        F.close()

        words = text.split()
        j = 0
        path = ''
        for i in words:
                if (j == 0):
                        path = i
                else:
                        bpy.ops.wm.link_append(directory = path + '\\Object\\', filename = i)
                        lastobjadded = bpy.data.objects[len(bpy.data.objects) - 1]
                j += 1
}

add_objects()
6

Vielen Dank!

7

Oops, exportscript.py and scenescript.py had a serious bug in how they read the objects. Here is the updated code:

main.py:

import os

BlenderPath = 'C:\Blender2.55\blender.exe'
scene_file = 'C:\scene.blend'
model_files = ['C:\model1.blend', 'C:\model2.blend', 'C:\model3.blend']

for i in model_files:
   os.spawnl(os.P_WAIT, BlenderPath, BlenderPath, " -b " + i + " -P exportscript.py"

os.spawnl(os.P_WAIT, BlenderPath, BlenderPath, " -b " + scene_file + " -t 8 -P scenescript.py"

exportscript.py:


import bpy

f = open('C://scene_info.tmp', 'a')

objs = bpy.data.objects
obj_list = []
for i in objs: 
    if (i.type == 'MESH'):
        obj_list.append(i.name)

f.write('
"' + bpy.data.filepath + '" ')
f.write('"' + str(len(obj_list)) + '" ')
for name in obj_list:
        f.write('"' + name + '"')
        f.write(" ")
f.close()

scenescript.py:


import bpy
import re

def add_objects():
                            
        F = open("C://scene_info.tmp", "r")
        text = F.read()
        F.close()

        words = re.findall('".*?"', text)
        
        k = 0
        path = ''
        for i in words:
                i = i[1:len(i) - 1:1]

                if (k < 0):
                        k = int(i)
                elif (k == 0):
                        path = i
                        k = -1
                elif (k > 0):
                        bpy.ops.wm.link_append(directory = path + '\\Object\\', filename = i)
                        lastobjadded = bpy.data.objects[len(bpy.data.objects) - 1]
                        k -= 1

add_objects()