List property set, property names and element types that have this

lraimo · April 2021

How is it possible to list all property set, property names and element types that have this in ifc file using IfcOpenShell Python. End result should be something like this

My code so far

lraimo · April 2021

Got the loop working, but still I do not know how to get property data type. Also if property set is attached to multiple ifc types would like to get result like this
AR_001-002(IfcColumn, IfcRailing )
001_Nimetus
002_Tüüp
At the moment get result like this
AR_001-002(IfcColumn)
001_Nimetus
002_Tüüp
AR_001-002(IfcRailing)
001_Nimetus
002_Tüüp
Code so war

    import ifcopenshell
    import tkinter as tk
    from tkinter import filedialog
    root = tk.Tk()
    root.withdraw()
    file_path =  filedialog.askopenfilename(title = "Vali IFC fail",filetypes = (("IFC","*.ifc"),("Kõik failid","*.*")))
    print(file_path)
    ifc_file = ifcopenshell.open(file_path)
    for IfcType in ifc_file.types_with_super():
        try:
            for definition in ifc_file.by_type(IfcType)[0].IsDefinedBy:
                if definition.is_a('IfcRelDefinesByProperties'):
                    property_set = definition.RelatingPropertyDefinition
                    substring = 'Pset_'
                    if substring in property_set.Name:
                        #print(property_set.Name + "on sees Pset_")
                        pass
                    else:
                        print(property_set.Name + "(" + IfcType + ")")
                        for property in property_set.HasProperties:
                            if property.is_a('IfcPropertySingleValue'):
                                print(" " + property.Name)
                                #print(" " + property.Type) Not working
        except:
            pass

Jesusbill · April 2021

Hi @lraimo, I have edited your post to show the code properly. You can use three quotes (```) above and below to do so.

Jesusbill · April 2021

Look also this thread that is similar.
ifcopenshell.util.element has functions that can help you get the property sets

Moult · April 2021

Property types can be retrieved either through the property template definition, or the stored nominal value attribute. Try property.NominalValue, as well as property.NominalValue.attribute_type(0), or property.NominalValue.is_a(), or type(property.NominalValue.wrappedValue) depending on what you're after.

lraimo · April 2021

property.NominalValue.is_a() was what I needed. Thanks.
property.NominalValue I get IfcText('Curtain Wall').
property.NominalValue.wrappedValue I get Curtain Wall.
property.NominalValue.is_a() I get IfcText.
property.NominalValue.attribute_type(0) did not work.

lraimo · April 2021

With code for IfcType in ifc_file.types_with_super() I get IFC Element, sample value IfcSlab
But there also is
IfcElementType , sample value IfcSlabType
PredefinedType, sample value ROOF
Is it possible to get those values by Python IfcOpenShell?

Moult · April 2021

It sounds like you want to query the schema, not an individual file. This has been documented to an extent here: https://wiki.osarch.org/index.php?title=IfcOpenShell_code_examples#Exploring_IFC_schema

lraimo · April 2021

No I want to get IfcElement (for example IfcSlab), IfcElementType (for example IfcSlabType), and PredefinedType ( for example Roof) for all PropertySets in IfcFile. I found a way how to get IfcElement and PredefinedType, but have not found a way to get IfcElementType.

lraimo · April 2021

My code:

import ifcopenshell
file_path = 'File path'
print(file_path)
ifc_file = ifcopenshell.open(file_path)
IfcElements = ifc_file.by_type('IfcSlab')
for IfcElement in IfcElements:
    print(IfcElement.is_a())
    print(IfcElement.PredefinedType)

lraimo · April 2021

Seems that both IfcElement and IfcElementType can be obtained with ifc_file.by_type(). But there should be connection between them because in viewer both are connected to one element.

Moult · April 2021

Try:

ifcopenshell.util.element.get_type(IfcElement)

lraimo · April 2021

That worked, thanks

List property set, property names and element types that have this

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