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

L by lraimo on 1 Apr 2021, edited 5 Apr 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

L by lraimo on 1 Apr 2021, edited 1 Apr 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

J by Jesusbill on 1 Apr 2021 #

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

J by Jesusbill on 1 Apr 2021 #

Look also this thread that is similar.

ifcopenshell.util.element has functions that can help you get the property sets

M by Moult on 1 Apr 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.

L by lraimo on 2 Apr 2021, edited 2 Apr 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.

L by lraimo on 2 Apr 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?

M by Moult on 3 Apr 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

L by lraimo on 3 Apr 2021, edited 3 Apr 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.

L by lraimo on 3 Apr 2021, edited 3 Apr 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)

L by lraimo on 3 Apr 2021, edited 3 Apr 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.

M by Moult on 4 Apr 2021 #

Try:


ifcopenshell.util.element.get_type(IfcElement)

L by lraimo on 5 Apr 2021 #

That worked, thanks