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IfcOpenShell - get psets from model object rather than element?

1. C by CSN on 31 Jul 2024, edited 31 Jul 2024 #

   Maybe a very simple question - but is there a way to get property sets from the 'model object' rather than querying elements in the model directly?

   At the moment I know ifcopenshell.util.element.get_psets / get_pset - which takes an element as its argument.

   Basically I would like to be able to generate a list of every property variant in a model. Imagine I want to know all the FireRating property values from the Pset_WallCommon property set.

   I guess I could iterate through every element in the model and return its value for this property, but is there an easier way?

2. M by Moult on 31 Jul 2024 # +4 votes

   Sure:

   
   values = set()
   
   for pset in ifc_file.by_type('IfcPropertySet'):
   
       if pset.Name != "Pset_WallCommon":
   
           continue
   
       for prop in pset.HasProperties:
   
           if prop.Name == "FireRating":
   
               values.add(prop.NominalValue.wrappedValue)
   

   I guess this is a oneliner:

   
   values = set()
   
   [[values.add(p.NominalValue) for p in ps.HasProperties if p.Name == "FireRating"] for ps in ifc_file.by_type('IfcPropertySet') if ps.Name == "Pset_WallCommon"]
   

   (untested)

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