I install 3mf add-on, and I use Python scripting as the following but it does not work.
How can I write the script?
import bpy
bpy.ops.import_mesh.threemf(filepath=c:\\work\\sample.3mf)
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2 Answers
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The add-on somehow uses an operator name that starts with a number. That's the problem. You should report this to the author of the add-on as a bug. You can fix this by changing the text:
bl_idname = "export_mesh.3mf"
to
bl_idname = "export_mesh.three_mf"
in %AppData%\Blender Foundation\Blender\3.3\scripts\addons\io_mesh_3mf\export_3mf.py
and also doing the same thing to %AppData%\Blender Foundation\Blender\3.3\scripts\addons\io_mesh_3mf\import_3mf.py only this time change
bl_idname = "import_mesh.3mf"
to
bl_idname = "import_mesh.three_mf"
You can then use 3mf import operator in your scripts
bpy.ops.import_mesh.three_mf(filepath="c:\\some_file.3mf")
answered Oct 2, 2022 at 14:23
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$\begingroup$ Thank you for your help. I confirmed that works! $\endgroup$– kn11nCommented Oct 2, 2022 at 16:17
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The above code is correct but not showing 3mf add-on installation on server environment where you don't have graphics card, and you can't install add-on using blender software. Below is the code to install and enable 3mf format using blender script:
import bpy
bpy.ops.preferences.addon_install(filepath='yourpath\\io_mesh_3mf\\__init__.py') # Need this part only one time to install add-on.
bpy.ops.preferences.addon_enable(module='io_mesh_3mf')
bpy.ops.import_mesh.threemf(filepath=yourpath)
Thanks
filepath="c:\\work\\sample.3mf"$\endgroup$AttributeError: Calling operator "bpy.ops.import_mesh.threemf" error, could not be found$\endgroup$