How get OST (Built-In Name) of element

Lists-Logic
6

Sure!

import clr, System
clr.AddReference("RevitNodes")
import Revit
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
clr.AddReference("RevitServices")
from RevitServices.Persistence import DocumentManager
doc = DocumentManager.Instance.CurrentDBDocument
 
catname = IN[0]
bic = System.Enum.GetValues(BuiltInCategory) 
cats, bics = [], []
for i in bic:
    try:
        cat = Revit.Elements.Category.ById(ElementId(i).IntegerValue)
        cats.append(cat)
        bics.append(i)
    except:
        pass
 
for i, b in zip(cats, bics):
    if catname == str(i): 
        ost = b 
 
OUT = ost
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