I am trying to create model groups with doc.Create.NewGroup() but i cant get it to work. What am i doing wrong?
Some background:
I am building a dynamo script to edit Model groups. It works fine, by ungroup->edit->regroup.
But to get nested groups to work i need a recursive function for grouping and ungrouping. Thats why i am struggling with creating groups in python.
Thanks, from what package is that?
Have you looked at the error? I’m guessing it’s something about invalid inputs since NewGroup() requires an ICollection.
A Collection is not the same a a list, but it’s super easy to convert to one.
myCollection = List[ElementId](elem)
is this the right way… or can i simplify it?
import System
import sys
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Structure import *
clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *
clr.AddReference('System')
from System.Collections.Generic import List
clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument
#Preparing input from dynamo to revit
elements = UnwrapElement(IN[0])
myCollection = List[ElementId]()
#Do some action in a Transaction
TransactionManager.Instance.EnsureInTransaction(doc)
for i in elements:
myCollection.Add(i.Id)
grouping = doc.Create.NewGroup(myCollection)
TransactionManager.Instance.TransactionTaskDone()
OUT = grouping
Yup, that’s about it. If you already have a list of Ids you can feed that directly to the collection creation but otherwise you would iterate through to get the Id like you did.
Yes, that did the trick! Thank you, i was not aware of ICollections.
Thanks for helping out with the solution. Works perfectly 
