bmobj.py

import bmesh
import bpy
from contextlib import contextmanager

@contextmanager
def bmesh_object(name):
    mesh = bpy.data.meshes.new(name)
    obj = bpy.data.objects.new(name, mesh)
    obj.draw_type = "WIRE"
    bpy.context.scene.objects.link(obj)
    bm = bmesh.new()
    try:
        yield obj, bm
    except:
        bpy.context.scene.objects.unlink(obj)
        bpy.data.meshes.remove(mesh)
        raise
    else:
        bm.to_mesh(mesh)
    finally:
        bm.free()


if __name__ == "__main__":
    # Test 1
    with bmesh_object("AssObject") as (obj, bm):
        print("(p)AssObject")
        pass
    
    with bmesh_object("ErrorObject") as (obj, bm):
        raise RuntimeError("purposeful error!")