AttributeError: module 'openpnm.models.misc' has no attribute 'difference' ??

[JorgeESantos]

Trying to perform the volume adjustment regarding the overlapping of spherical pores and cylindrical throats presented at:
[(https://openpnm.org/examples/tutorials/05_defining_geometry.html)]

Code segment:

from functions import Trigo_scaffolds, Voxel_image, TPMS_engine, scatter_3Ddataset
import numpy as np
import porespy as ps
import openpnm as pnm

#Generating Binary image
#M, voxel_lenght = Trigo_scaffolds(Geo='b', shape=[2,2,2], elem=27, meshdata=False, min_dimen=13e-3)
M, voxel_lenght = TPMS_engine([2,2,2], elem=31, min_dimen=13e-3, iT=0.35, meshdata=False)
#Voxel_image(M, 'oldlace', 'darkgray')

#region Network creations
from skimage.feature import peak_local_max
from functions import region3D_centroids, peaks_MBA_filter, Watershed_regions
from porespy.networks import snow2, regions_to_network
from edt import edt3d
M0 = np.logical_not(M)
peaks = region3D_centroids(peak_local_max(edt3d(M0, black_border=True), indices=False)*1*edt3d(M0, black_border=True))[0]
peaks = peaks_MBA_filter(M0, peaks=peaks, minimum=2.0)[0]
#snow_net = snow2(M0, boundary_width=0, accuracy='high',
                 #voxel_size=voxel_lenght)
Net = regions_to_network(Watershed_regions(M0, peaks, return_img=False), voxel_size=voxel_lenght, accuracy='high')
settings = {'pore_shape': 'sphere',
            'throat_shape': 'cylinder',
            'pore_diameter': 'equivalent_diameter',
            'throat_diameter': 'equivalent_diameter'}
#Exception: 'spheres_and_cylinders' can only be applied when throat diameter is smaller than that of adjacent pores.
#o erro desapareceu após a aplicação da escala
#todo tentar perceber as diferenças entre os diâmetros
Net, geo = pnm.io.PoreSpy.import_data(Net, settings=settings)
#snow_net, snow_geo = pnm.io.PoreSpy.import_data(snow_net.network, settings=settings)
Net = ps.networks.label_boundaries(Net, labels=[['left', 'right'], ['front', 'back'], ['top', 'bottom']])
#snow_net = ps.networks.label_boundaries(snow_net, labels=[['left', 'right'], ['front', 'back'], ['top', 'bottom']])
print('Network and Geometry assigned')
#endregion

#region Geometrical modifications
#todo nothing to do here for now

"""Spherical pores overlap with their throats

A spherical pore will always have a region of overlap with its connected throats.
The volume of this region will be double counted if an extra step is not taken."""

geo.add_model(propname='throat.lens_volume',
             model=pnm.models.geometry.throat_volume.lens)
geo.add_model(propname='throat.volume',
             model=pnm.models.misc.difference,
             props=['throat.total_volume', 'throat.lens_volume'])

This raised "AttributeError: module 'openpnm.models.misc' has no attribute 'difference'". can you please fix it or provide another way to make the adjustment please?

Regards.

[jgostick]

did you update your version of OpenPNM? We release V3 this week. You can check by doing op.__version__ at the command line.

[JorgeESantos]

No I have not. I didn't noticed that the v3 was realeased. Thank you professor.