python.py

import ifcopenshell

f = ifcopenshell.open("Stratumsedijk_AC17_08-04-2015.ifc")
windows = f.by_type("ifcWindow")

print(windows)
print(len(windows))  # when i have the zero in brakets after f.by_type _ i get the number of elements in brackets for the first element
# print(windows.is_a())# in this case this commands in working and shows that its ifcWindows.
# when i have no 0 in brakets, the command len gives the number of windows in the file . and command windows.is_a does not work

prop_dict = {}
for window in windows:
    print('parsing object with id', window.id())
    propsets = []

    def process_pset(prop_def):
        if prop_def is not None:
            prop_set_name = prop_def.Name
            props = {}
            if prop_def.is_a("IfcElementQuantity"):
                for q in prop_def.Quantities:
                    if q.is_a("IfcPhysicalSimpleQuantity"):
                        props[q.Name] = q[3]
            elif prop_def.is_a("IfcPropertySet"):
                for prop in prop_def.HasProperties:
                    if prop.is_a("IfcPropertySingleValue"):
                        props[prop.Name] = prop.NominalValue
            else:
                # Entity introduced in IFC4
                # prop_def.is_a("IfcPreDefinedPropertySet"):
                for prop in range(4, len(prop_def)):
                    props[prop_def.attribute_name(prop)] = prop_def[prop]

            if "IsExternal" in props:
                print("\tIsExternal", props['IsExternal'])
            if "LoadBearing" in props:
                print("\tLoadBearing", props['LoadBearing'])
            if "FireRating" in props:
                print("\tFireRating", props['FireRating'])

            return prop_set_name, props


    try:
        for is_def_by in window.IsDefinedBy:
            if is_def_by.is_a("IfcRelDefinesByProperties"):
                propsets.append(process_pset(is_def_by.RelatingPropertyDefinition))
            elif is_def_by.is_a("IfcRelDefinesByType"):
                type_psets = is_def_by.RelatingType.HasPropertySets
                if type_psets is None:
                    continue
                for propset in type_psets:
                    propsets.append(process_pset(propset))
    except Exception as e:
        import traceback

        print("failed to load properties: {}".format(e))
        traceback.print_exc()

    if len(propsets):
        prop_dict[str(window)] = propsets