## On this page

  

 

 # ElementSet

 Last update: 16.07.2026 

<a id="compolyx.ElementSet"></a>

### *class* compolyx.ElementSet(graph, obj=None, parent=None)

Element set class.

### Exemplary usage

```pycon
>>> m=db.models.values()[-1]
>>> eset=m.element_sets['DECK']
>>> eset.modify(op='none')
>>> eset.modify(op='new', element_labels=[1,2,3,4])
>>> eset.modify(op='add', element_sets=[ m.element_sets['Deck_layup-1'] ])
>>> eset.modify(op='intersect', x=[-6.5,-5.5])

```

### Attributes

NameDescription[`ElementSet.active`](compolyx.ElementSet.active.md#compolyx.ElementSet.active)Active status of the object.[`ElementSet.boundaries`](compolyx.ElementSet.boundaries.md#compolyx.ElementSet.boundaries)Returns the boundaries of the element set.[`ElementSet.element_labels`](compolyx.ElementSet.element_labels.md#compolyx.ElementSet.element_labels)[`ElementSet.enabled`](compolyx.ElementSet.enabled.md#compolyx.ElementSet.enabled)Indicates whether the object is enabled.[`ElementSet.id`](compolyx.ElementSet.id.md#compolyx.ElementSet.id)ID of the object.[`ElementSet.is_dict_item`](compolyx.ElementSet.is_dict_item.md#compolyx.ElementSet.is_dict_item)Indicates whether the object is an item in a dictionary.[`ElementSet.is_list_item`](compolyx.ElementSet.is_list_item.md#compolyx.ElementSet.is_list_item)Indicates whether the object is an item of a list.[`ElementSet.link_path`](compolyx.ElementSet.link_path.md#compolyx.ElementSet.link_path)Root path of the current node in the tree for links to this object.[`ElementSet.locked`](compolyx.ElementSet.locked.md#compolyx.ElementSet.locked)Element set is imported and cannot be changed.[`ElementSet.middle_offset`](compolyx.ElementSet.middle_offset.md#compolyx.ElementSet.middle_offset)Middle offset flag.[`ElementSet.name`](compolyx.ElementSet.name.md#compolyx.ElementSet.name)Name of the object.[`ElementSet.normals`](compolyx.ElementSet.normals.md#compolyx.ElementSet.normals)Returns the Normals of the element set.[`ElementSet.orientable`](compolyx.ElementSet.orientable.md#compolyx.ElementSet.orientable)True if the element set has an orientable topology.[`ElementSet.parent`](compolyx.ElementSet.parent.md#compolyx.ElementSet.parent)Parent object in the tree.[`ElementSet.planar`](compolyx.ElementSet.planar.md#compolyx.ElementSet.planar)True if the element set has a planar topology.[`ElementSet.root_path`](compolyx.ElementSet.root_path.md#compolyx.ElementSet.root_path)Root path of the current node in the tree.[`ElementSet.size`](compolyx.ElementSet.size.md#compolyx.ElementSet.size)Number of entities.[`ElementSet.status`](compolyx.ElementSet.status.md#compolyx.ElementSet.status)Status of the object.[`ElementSet.status_changed`](compolyx.ElementSet.status_changed.md#compolyx.ElementSet.status_changed)Boolean flag which is set to true in C++ when up-to-date status of object changes.[`ElementSet.uid`](compolyx.ElementSet.uid.md#compolyx.ElementSet.uid)UID of the object.[`ElementSet.vertex`](compolyx.ElementSet.vertex.md#compolyx.ElementSet.vertex)Raises an error if the object has been removed from the graph.### Methods

NameDescription[`ElementSet.add`](compolyx.ElementSet.add.md#compolyx.ElementSet.add)(entity)Add entity to the set.[`ElementSet.clear`](compolyx.ElementSet.clear.md#compolyx.ElementSet.clear)()[`ElementSet.find_parent`](compolyx.ElementSet.find_parent.md#compolyx.ElementSet.find_parent)(type)Steps up the tree and returns the first parent with given type.[`ElementSet.get_short_description`](compolyx.ElementSet.get_short_description.md#compolyx.ElementSet.get_short_description)()[`ElementSet.modify`](compolyx.ElementSet.modify.md#compolyx.ElementSet.modify)(\[op, element\_labels, ...\])General method to modify the elements in an element set.[`ElementSet.obj_exists`](compolyx.ElementSet.obj_exists.md#compolyx.ElementSet.obj_exists)()Checks if \_\_obj still references the c++ object (has not been reset to None by self.\_delete) and exists in the graph.[`ElementSet.partition`](compolyx.ElementSet.partition.md#compolyx.ElementSet.partition)()Partitions this ElementSet into new ElementSets with an orientable topology.[`ElementSet.remove`](compolyx.ElementSet.remove.md#compolyx.ElementSet.remove)(entity)Remove entity from the set.[`ElementSet.serialize`](compolyx.ElementSet.serialize.md#compolyx.ElementSet.serialize)()Serialize to Python string.[`ElementSet.serialize_name_and_id`](compolyx.ElementSet.serialize_name_and_id.md#compolyx.ElementSet.serialize_name_and_id)()Serializes the name and ID.[`ElementSet.update`](compolyx.ElementSet.update.md#compolyx.ElementSet.update)()[`ElementSet.visit`](compolyx.ElementSet.visit.md#compolyx.ElementSet.visit)(visitor)Walk through the tree and let the visitor perform action on every descendant node.[`ElementSet.write_boundaries`](compolyx.ElementSet.write_boundaries.md#compolyx.ElementSet.write_boundaries)(filename\[, format\])Write boundaries in .iges/.step format.