TypeError Collection from model.translatemark after model.duplicatemark

ALu

Hello,

this code stops with a TypeError on the last command line.

How to assign correctly the duplicated collection to the translatemark method?

How to save the duplicated element IDs to a list?

import hm
import hm.entities as ent
model = hm.Model()

visible_elements = hm.CollectionByDisplayed(model, ent.Element)
elems_to_copy = [elem.id for elem in visible_elements]

col = hm.Collection(model, ent.Element, elems_to_copy)
col_dup = model.duplicatemark(col, 0)

vector = [0,0,1]
distance = 2.
col_tran = model.translatemark(col_dup, vector, distance)

Michal Stefuca

Hi @ALu

HyperMesh functions can be divided into two main categories: modify functions and query functions. As always, there are some exceptions, but in general modify functions return only a status object and query function return a tuple of status object and result object (see HyperMesh Functions — HyperMesh Python API 2025 documentation).

In your code, col_dup represents a status object, not a collection. In order to capture the entities resulting from the duplicatemark operation, you can either use entity recording (hm_entityrecorder) or you can do a diff between entities before and after:

col = hm.Collection(model, ent.Element, elems_to_copy)
col_before = hm.Collection(model, ent.Element)
status = model.duplicatemark(col, 0)
col_after = hm.Collection(model, ent.Element)

col_dup = col_after - col_before

vector = [0,0,1]
distance = 2.
col_tran = model.translatemark(col_dup, vector, distance)

Thanks,
Michal Stefuca

Automation & Customization