Is it possible to get hosted structural opening cuts from host family instance through dynamo.

Hello @diptajit, if I understood correctly you want to check if your structural elements have opening cuts. What you need then is to get dependent elements from your structural elements and that can be done by tapping Revit’s API import clr clr.AddReference('ProtoGeometry') from Autodesk.DesignScript.Geometry import * clr.AddReference('RevitAPI') import Autodesk from Autodesk.Revit.DB import * # The inputs to this node will be stored as a list in the IN variables. dataEnteringNode = UnwrapElement(IN[0]) classFilter = ElementClassFilter(Opening) # Place your code below this line openings=dataEnteringNode.GetDependentElements(classFilter) # Assign your output to the OUT variable. OUT = openings [HostedElements_2022-04-11_10-36-30] The script in the current form will work only on a single element. So you might want to run it in a loop. Hope that sets you in the right direction! HostedElements.dyn (6.6 KB)

[image] Get host via Python, how? Revit Hello, import clr clr.AddReference('ProtoGeometry') from Autodesk.DesignScript.Geometry import * clr.AddReference('RevitAPI') import Autodesk from Autodesk.Revit.DB import * elementlist =[] for item in IN[0]: try: elementlist.append(item.Host) except: elementlist.append(emptylist) OUT = elementlist Actually my list remains emty. how can I get my hostelements. KR Andreas [grafik] You can try it with generic models… KR Andreas

@Draxl_Andreas thanks for your reply. Actually what I am looking for is to get hosted structural opening cut elements from the host Structural Column Family. The link you shared is suggesting a way to get host element from hosted elements. Things are even challenging because the elements I am looking for are Structural Opening Cuts.

Hi @kristaps.rusis, this script works perfectly. Just that I am getting element Ids in string format instead of the actual elements. Can you please explain me why. Though it’s just an extra step, still for the sake of knowledge. [1]

@diptajit tbh I am not to sure why could be because that is how Revit’s database collects elements (that’s my best guess). The Revit’s API is very extensive so same as you, I am still learning new things every day!

Hi @kristaps.rusis I am really struggling to loop the script in a way that it can process multiple elements can you please provide a script that can handle a list of elements at once.

[1] Well I did resolved the issue by putting it into a custom node and it works fine with a list of elements. But still definitely will like to know the way how it could be done only through script only. If someone shares the same here it would be great help. Thank you.

@diptajit from Revits Api you can find methods that do that GetElement Method (ElementId) Online Documentation for Autodesk's Revit API: 2015, 2016, 2017, 2017.1, 2018 import clr clr.AddReference('ProtoGeometry') from Autodesk.DesignScript.Geometry import * clr.AddReference('RevitAPI') import Autodesk from Autodesk.Revit.DB import * clr.AddReference("RevitServices") from RevitServices.Persistence import DocumentManager # The inputs to this node will be stored as a list in the IN variables. dataEnteringNode = UnwrapElement(IN[0]) doc = DocumentManager.Instance.CurrentDBDocument classFilter = ElementClassFilter(Opening) # Place your code below this line openings = dataEnteringNode.GetDependentElements(classFilter) openingsById = doc.GetElement(openings[0]) # Assign your output to the OUT variable. OUT = openingsById

Structural Opening Cut from Host

Revit

Draxl_Andreas April 11, 2022, 3:14pm 2

You can try it with generic models…

Andreas

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Structural Opening Cut from Host

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