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 # ModelingGroup

 Last update: 16.07.2026 

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

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

Class to manage modeling groups.

Access:

```pycon
>>> import compolyx
>>> db = compolyx.DB()
>>> model = db.models['class40.1']
>>> mpg = model.modeling_groups['PlyGroup.1']

```

Creation:

```pycon
>>> import compolyx
>>> db = compolyx.DB()
>>> model = db.models['class40.1']
>>> mpg_1 = model.create_modeling_group('PlyGroup.1')

```

### Attributes

NameDescription[`ModelingGroup.active`](compolyx.ModelingGroup.active.md#compolyx.ModelingGroup.active)Active status of the object.[`ModelingGroup.enabled`](compolyx.ModelingGroup.enabled.md#compolyx.ModelingGroup.enabled)Indicates whether the object is enabled.[`ModelingGroup.id`](compolyx.ModelingGroup.id.md#compolyx.ModelingGroup.id)ID of the object.[`ModelingGroup.is_dict_item`](compolyx.ModelingGroup.is_dict_item.md#compolyx.ModelingGroup.is_dict_item)Indicates whether the object is an item in a dictionary.[`ModelingGroup.is_list_item`](compolyx.ModelingGroup.is_list_item.md#compolyx.ModelingGroup.is_list_item)Indicates whether the object is an item of a list.[`ModelingGroup.link_path`](compolyx.ModelingGroup.link_path.md#compolyx.ModelingGroup.link_path)Root path of the current node in the tree for links to this object.[`ModelingGroup.name`](compolyx.ModelingGroup.name.md#compolyx.ModelingGroup.name)Name of the object.[`ModelingGroup.parent`](compolyx.ModelingGroup.parent.md#compolyx.ModelingGroup.parent)Parent object in the tree.[`ModelingGroup.plies`](compolyx.ModelingGroup.plies.md#compolyx.ModelingGroup.plies)Modeling plies of the Modeling Group.[`ModelingGroup.root_path`](compolyx.ModelingGroup.root_path.md#compolyx.ModelingGroup.root_path)Root path of the current node in the tree.[`ModelingGroup.size`](compolyx.ModelingGroup.size.md#compolyx.ModelingGroup.size)Number of entities.[`ModelingGroup.status`](compolyx.ModelingGroup.status.md#compolyx.ModelingGroup.status)Status of the object.[`ModelingGroup.status_changed`](compolyx.ModelingGroup.status_changed.md#compolyx.ModelingGroup.status_changed)Boolean flag which is set to true in C++ when up-to-date status of object changes.[`ModelingGroup.uid`](compolyx.ModelingGroup.uid.md#compolyx.ModelingGroup.uid)UID of the object.[`ModelingGroup.vertex`](compolyx.ModelingGroup.vertex.md#compolyx.ModelingGroup.vertex)Raises an error if the object has been removed from the graph.### Methods

NameDescription[`ModelingGroup.add`](compolyx.ModelingGroup.add.md#compolyx.ModelingGroup.add)(entity)Add entity to the set.[`ModelingGroup.clear`](compolyx.ModelingGroup.clear.md#compolyx.ModelingGroup.clear)()[`ModelingGroup.copy_butt_joint_sequence`](compolyx.ModelingGroup.copy_butt_joint_sequence.md#compolyx.ModelingGroup.copy_butt_joint_sequence)(source)Makes a copy of a butt-joint sequence.[`ModelingGroup.copy_interface_layer`](compolyx.ModelingGroup.copy_interface_layer.md#compolyx.ModelingGroup.copy_interface_layer)(source\[, ...\])Copy an interface layer.[`ModelingGroup.copy_modeling_ply`](compolyx.ModelingGroup.copy_modeling_ply.md#compolyx.ModelingGroup.copy_modeling_ply)(source\[, ...\])Copy a modeling ply.[`ModelingGroup.copy_sequence_entity`](compolyx.ModelingGroup.copy_sequence_entity.md#compolyx.ModelingGroup.copy_sequence_entity)(source\[, ...\])[`ModelingGroup.create_butt_joint_sequence`](compolyx.ModelingGroup.create_butt_joint_sequence.md#compolyx.ModelingGroup.create_butt_joint_sequence)(\[...\])Creates a new butt-joint sequences and adds it to this modeling group.[`ModelingGroup.create_interface_layer`](compolyx.ModelingGroup.create_interface_layer.md#compolyx.ModelingGroup.create_interface_layer)(\[name, ...\])Create an interface layer.[`ModelingGroup.create_modeling_ply`](compolyx.ModelingGroup.create_modeling_ply.md#compolyx.ModelingGroup.create_modeling_ply)(\[name, ...\])Create modeling ply.[`ModelingGroup.export_ply_geometries`](compolyx.ModelingGroup.export_ply_geometries.md#compolyx.ModelingGroup.export_ply_geometries)(filename)Exports the surface, boundary, and/or fiber directions of modeling, production, and analysis ply to .igs or .step file.[`ModelingGroup.find_parent`](compolyx.ModelingGroup.find_parent.md#compolyx.ModelingGroup.find_parent)(type)Steps up the tree and returns the first parent with given type.[`ModelingGroup.get_short_description`](compolyx.ModelingGroup.get_short_description.md#compolyx.ModelingGroup.get_short_description)()[`ModelingGroup.is_imported`](compolyx.ModelingGroup.is_imported.md#compolyx.ModelingGroup.is_imported)()[`ModelingGroup.obj_exists`](compolyx.ModelingGroup.obj_exists.md#compolyx.ModelingGroup.obj_exists)()Checks if \_\_obj still references the c++ object (has not been reset to None by self.\_delete) and exists in the graph.[`ModelingGroup.remove`](compolyx.ModelingGroup.remove.md#compolyx.ModelingGroup.remove)(entity)Remove entity from the set.[`ModelingGroup.reorder_plies`](compolyx.ModelingGroup.reorder_plies.md#compolyx.ModelingGroup.reorder_plies)(source, target)Reorder the ply group.[`ModelingGroup.serialize`](compolyx.ModelingGroup.serialize.md#compolyx.ModelingGroup.serialize)(\[butt\_joints\])Serialize to Python string.[`ModelingGroup.serialize_name_and_id`](compolyx.ModelingGroup.serialize_name_and_id.md#compolyx.ModelingGroup.serialize_name_and_id)()Serializes the name and ID.[`ModelingGroup.split_modeling_plies_by_production_material`](compolyx.ModelingGroup.split_modeling_plies_by_production_material.md#compolyx.ModelingGroup.split_modeling_plies_by_production_material)(\*)Split modeling plies into separate modeling plies for each production material.[`ModelingGroup.sync_plies`](compolyx.ModelingGroup.sync_plies.md#compolyx.ModelingGroup.sync_plies)()[`ModelingGroup.update`](compolyx.ModelingGroup.update.md#compolyx.ModelingGroup.update)()[`ModelingGroup.visit`](compolyx.ModelingGroup.visit.md#compolyx.ModelingGroup.visit)(visitor)Walk through the tree and let the visitor perform action on every descendant node.