FEMMT can not handle Python 3.11 using string-enums

Describe the bug Seems like there is a change in string-enums when switching from python 3.10 to 3.11. This behaviour was tested on windows and linux.

To Reproduce Run this example code on python 3.11

    # Working directory can be set arbitrarily
    working_directory = os.path.join(example_results_folder, "inductor")
    if not os.path.exists(working_directory):
        os.mkdir(working_directory)

    # 1. chose simulation type
    geo = fmt.MagneticComponent(component_type=fmt.ComponentType.Inductor, working_directory=working_directory, silent=True)

    inductor_frequency = 270000

    # 2. set core parameters
    core_db = fmt.core_database()["PQ 40/40"]
    core_dimensions = fmt.dtos.SingleCoreDimensions(core_inner_diameter=core_db["core_inner_diameter"],
                                                    window_w=core_db["window_w"],
                                                    window_h=core_db["window_h"])

    core = fmt.Core(core_type=fmt.CoreType.Single,
                    core_dimensions=core_dimensions,
                    material="N49", temperature=45, frequency=inductor_frequency,
                    # permeability_datasource="manufacturer_datasheet",
                    permeability_datasource=fmt.MaterialDataSource.Measurement,
                    permeability_datatype=fmt.MeasurementDataType.ComplexPermeability,
                    permeability_measurement_setup="LEA_LK",
                    permittivity_datasource=fmt.MaterialDataSource.Measurement,
                    permittivity_datatype=fmt.MeasurementDataType.ComplexPermittivity,
                    permittivity_measurement_setup="LEA_LK")
                    # mu_rel=3000, phi_mu_deg=10,
                    # sigma=0.5)
    geo.set_core(core)

    # 3. set air gap parameters
    air_gaps = fmt.AirGaps(fmt.AirGapMethod.Percent, core)
    air_gaps.add_air_gap(fmt.AirGapLegPosition.CenterLeg, 0.0005, 50)
    # air_gaps.add_air_gap(fmt.AirGapLegPosition.CenterLeg, 0.0002, 90)
    geo.set_air_gaps(air_gaps)

    # 4. set insulations
    insulation = fmt.Insulation()
    insulation.add_core_insulations(0.001, 0.001, 0.004, 0.001)
    insulation.add_winding_insulations([[0.0005]])
    geo.set_insulation(insulation)

    # 5. create winding window and virtual winding windows (vww)
    winding_window = fmt.WindingWindow(core, insulation)
    vww = winding_window.split_window(fmt.WindingWindowSplit.NoSplit)

    # 6. create conductor and set parameters: use solid wires
    winding = fmt.Conductor(0, fmt.Conductivity.Copper, winding_material_temperature=45)
    winding.set_solid_round_conductor(conductor_radius=0.0013, conductor_arrangement=fmt.ConductorArrangement.Square)
    winding.parallel = False  # set True to make the windings parallel, currently only for solid conductors
    #winding.set_litz_round_conductor(conductor_radius=0.0013, number_strands=150, strand_radius=100e-6,
    #fill_factor=None, conductor_arrangement=fmt.ConductorArrangement.Square)

    # 7. add conductor to vww and add winding window to MagneticComponent
    vww.set_winding(winding, 9, None)
    geo.set_winding_windows([winding_window])

    # 8. create the model
    geo.create_model(freq=inductor_frequency, pre_visualize_geometry=True, save_png=False)

    # 6.a. start simulation
    geo.single_simulation(freq=inductor_frequency, current=[4.5],
                          plot_interpolation=False, show_fem_simulation_results=True)

Expected behavior Simulation should run without any problems.

Screenshots

Traceback (most recent call last):
  File "\FEM_Magnetics_Toolbox\femmt\examples\basic_example.py", line 147, in <module>
    geo.single_simulation(freq=inductor_frequency, current=[4.5],
  File "\FEM_Magnetics_Toolbox\femmt\component.py", line 836, in single_simulation
    self.excitation(frequency=freq, amplitude_list=current, phase_deg_list=phi_deg, plot_interpolation=plot_interpolation)  # frequency and current
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "\FEM_Magnetics_Toolbox\femmt\component.py", line 702, in excitation
    self.core.update_core_material_pro_file(frequency, self.file_data.electro_magnetic_folder_path, plot_interpolation)  # frequency update to core class
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "\FEM_Magnetics_Toolbox\femmt\model.py", line 388, in update_core_material_pro_file
    self.material_database.permeability_data_to_pro_file(temperature=self.temperature, frequency=frequency,
  File "\materialdatabase\materialdatabase\material_data_base_classes.py", line 99, in permeability_data_to_pro_file
    permeability_data = self.data[f"{material_name}"][f"measurements"][f"{datatype}"][f"{measurement_setup}"][
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
KeyError: 'MeasurementDataType.ComplexPermeability'

Desktop (please complete the following information): Windows python 3.10: works Windows python 3.11: fails Linux python 3.10: works Windows python 3.11: fails

upb-lea / FEM_Magnetics_Toolbox

FEMMT can not handle Python 3.11 using string-enums #36