Modification Script to In-Model Selected elementes

API & Interfaces
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1

Problem

I have tried to create a script that uses the current selection in the model to perform an action.
I want to be able to:

  1. select several beams in the model -> run a script (python) -> Script modifies the selected beams (hinges, types, etc.)
    OR
  2. Run a script (python) -> Prompt to select objects in the model -> Enter -> Selected objects are modified.

Is that possible?
I am using the RFEM_Python_Client Repository and I have tried with the "GetObjectNumbersByType" and "ObjectsInfo.AllSelectedObjectsInfo"

If I understand correctly the functionality I wish for is not possible with these classes.

Current code

If it helps I have the following code that retrieves all nodes in the opened model. I want it to only retrieve the ones I have selected.

from RFEM.initModel import *
from RFEM.enums import *
from RFEM.BasicObjects.node import Node

Model(new_model=False, model_name="Script Tester", delete=False, delete_all=False)

from RFEM.Tools.GetObjectNumbersByType import GetObjectNumbersByType

selected_nodes = GetObjectNumbersByType(ObjectTypes.E_OBJECT_TYPE_NODE)

# Get information for each selected node
selected_nodes_info = []
for node_no in selected_nodes:
    node_data = Node.GetNode(node_no)
    selected_nodes_info.append({
        'number': node_data.no,
        'coordinates': (node_data.coordinate_1, node_data.coordinate_2, node_data.coordinate_3),
        'comment': getattr(node_data, 'comment', '')
    })

# Example: print the info
for info in selected_nodes_info:
    print(info)
4

Hi Mark,

This is fully possible using the new gRPC-based Python API, which allows you to retrieve only currently selected objects directly from the model.

from dlubal.api import rfem

with rfem.Application() as rfem_app:
    
    # Get selected nodes only
    selected_nodes = rfem_app.get_object_list(
        objs=[
            rfem.structure_core.Node()
        ],
        only_selected=True
    )

    # Get information for each selected node
    selected_nodes_info = []
    for node in selected_nodes:
        selected_nodes_info.append({
            'number': node.no,
            'coordinates': (node.coordinate_1, node.coordinate_2, node.coordinate_3),
            'comment': node.comment
        })

    # Example: print the info
    for info in selected_nodes_info:
        print(info)

This allows you to:

  • Select nodes (or any other objects) manually in the RFEM GUI

  • Run your script to work only with the selected ones — no extra filtering needed

While the legacy API (SOAP-based) remains available, ongoing development is focused on the new gRPC-based API, which provides extended functionality like this.

Let me know if you’d like help setting it up.

Tomas

5

Thank you Tomas for the fast reply,

if I understand correctly the answer is no - you need to subscribe to the new API for the functionality?

6

Yes, it seems that the functionality is only supported in the new gRPC API. However, there’s no need to subscribe for it, as each Dlubal user automatically receives a free subscription plan with 1,000 API calls per month. Feel free to give it a try!

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7

Thank you once again Tomas. I will make sure to try it out.

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