simple_blender_server/main.py.tmpl

import bpy  # type: ignore


{{.ModelCode}}


def guarded_model() -> bpy.types.Object:
    try:
        out = model()  # type: ignore
        if out is None:
            raise TypeError("Function `model` cannot return type `None`.")
        return out
    except NameError:
        raise NotImplementedError("No function named `model` was provided!")


def export_to_stl(obj: bpy.types.Object):
    """
    Export a Blender object as an STL binary blob.

    Parameters:
        obj (bpy.types.Object): The object to export

    Returns:
        bytes: Binary data of the STL file
    """
    # Ensure the object is the only object, is selected, and is active
    bpy.ops.object.select_all(action="SELECT")
    obj.select_set(False)
    bpy.ops.object.delete()
    obj.select_set(True)
    bpy.context.view_layer.objects.active = obj

    bpy.ops.wm.stl_export(filepath="{{.Filename}}")


def main():
    export_to_stl(guarded_model())


main()