fixes most of the python2 unit tests

src/Circulator.hh

@@ -89,7 +89,6 @@ void expose_circulator(py::module& m, const char *_name) {
 		.def(py::init<PolyMesh&, CenterEntityHandle>())
 		.def("__iter__", &CirculatorWrapperT<Circulator, CenterEntityHandle>::iter)
 		.def("__next__", &CirculatorWrapperT<Circulator, CenterEntityHandle>::next)
-		.def("next", &CirculatorWrapperT<Circulator, CenterEntityHandle>::next)
 		;
 }
 

src/Iterator.hh

@@ -114,7 +114,6 @@ void expose_iterator(py::module& m, const char *_name) {
 		.def("__iter__", &IteratorWrapperT<Iterator, n_items>::iter)
 		.def("__next__", &IteratorWrapperT<Iterator, n_items>::next)
 		.def("__len__", &IteratorWrapperT<Iterator, n_items>::len)
-		.def("next", &IteratorWrapperT<Iterator, n_items>::next)
 		;
 }
 

tests/test_property.py

@@ -52,26 +52,26 @@ class Property(unittest.TestCase):
         
         # Check if property it is ok
         v_it = self.mesh.vertices()
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 0)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 2)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 3)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 0)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 2)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 3)
         
         # Check vertex positions
         v_it = self.mesh.vertices()
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
@@ -79,52 +79,52 @@ class Property(unittest.TestCase):
         # Copy from vertex 1 to 0, with skipping build in properties
         self.mesh.copy_all_properties(self.vhandle[1], self.vhandle[0])
         v_it = self.mesh.vertices()
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
         v_it = self.mesh.vertices()
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 2)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 3)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 2)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 3)
 
         # Copy from vertex 2 to 3, including build in properties
         self.mesh.copy_all_properties(self.vhandle[2], self.vhandle[3], True)
         v_it = self.mesh.vertices()
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
         v_it = self.mesh.vertices()
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 2)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 2)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 2)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 2)
         
     def test_check_status_properties_halfedge_edge_all_deleted(self):
         self.mesh.request_vertex_status()
@@ -212,26 +212,26 @@ class Property(unittest.TestCase):
         
         # Check if property it is ok
         v_it = self.mesh.vertices()
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 0)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 2)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 3)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 0)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 2)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 3)
 
         # Check vertex positions
         v_it = self.mesh.vertices()
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
@@ -239,52 +239,52 @@ class Property(unittest.TestCase):
         # Copy from vertex 1 to 0, with skipping build in properties
         self.mesh.copy_all_properties(self.vhandle[1], self.vhandle[0])
         v_it = self.mesh.vertices()
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
         v_it = self.mesh.vertices()
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 2)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 3)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 2)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 3)
 
         # Copy from vertex 2 to 3, including build in properties
         self.mesh.copy_all_properties(self.vhandle[2], self.vhandle[3], True)
         v_it = self.mesh.vertices()
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 0)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 0)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
-        vh = v_it.next()
+        vh = next(v_it)
         self.assertEqual(self.mesh.point(vh)[0], 1)
         self.assertEqual(self.mesh.point(vh)[1], 1)
         self.assertEqual(self.mesh.point(vh)[2], 0)
         v_it = self.mesh.vertices()
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 1)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 2)
-        self.assertEqual(self.mesh.property(intHandle, v_it.next()), 2)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 1)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 2)
+        self.assertEqual(self.mesh.property(intHandle, next(v_it)), 2)
 
 if __name__ == '__main__':
     suite = unittest.TestLoader().loadTestsFromTestCase(Property)

tests/test_trimesh_circulator_face_edge.py

@@ -41,10 +41,11 @@ class TriMeshCirculatorFaceEdge(unittest.TestCase):
     def test_face_edge_iter_without_holes_increment(self):
         # Iterate around face 1 at the middle
         fe_it = openmesh.FaceEdgeIter(self.mesh, self.mesh.face_handle(1))
-        self.assertEqual(fe_it.__next__().idx(), 4)
-        self.assertEqual(fe_it.__next__().idx(), 1)
-        self.assertEqual(fe_it.__next__().idx(), 3)
-        self.assertRaises(StopIteration, fe_it.__next__)
+        self.assertEqual(next(fe_it).idx(), 4)
+        self.assertEqual(next(fe_it).idx(), 1)
+        self.assertEqual(next(fe_it).idx(), 3)
+        with self.assertRaises(StopIteration):
+            next(fe_it)
 
 
 if __name__ == '__main__':

tests/test_trimesh_circulator_face_face.py

@@ -49,9 +49,10 @@ class TrimeshCirculatorFaceFace(unittest.TestCase):
 
         ff_it = self.mesh.ff(self.mesh.face_handle(1))
 
-        self.assertEqual(ff_it.__next__().idx(), 2)
-        self.assertEqual(ff_it.__next__().idx(), 0)
-        self.assertRaises(StopIteration, ff_it.__next__)
+        self.assertEqual(next(ff_it).idx(), 2)
+        self.assertEqual(next(ff_it).idx(), 0)
+        with self.assertRaises(StopIteration):
+            next(ff_it)
 
     def test_face_face_iter_without_holes(self):
         # Add some vertices
@@ -106,10 +107,11 @@ class TrimeshCirculatorFaceFace(unittest.TestCase):
 
         ff_it = self.mesh.ff(self.mesh.face_handle(1))
         
-        self.assertEqual(ff_it.__next__().idx(), 2)
-        self.assertEqual(ff_it.__next__().idx(), 0)
-        self.assertEqual(ff_it.__next__().idx(), 3)
-        self.assertRaises(StopIteration, ff_it.__next__)
+        self.assertEqual(next(ff_it).idx(), 2)
+        self.assertEqual(next(ff_it).idx(), 0)
+        self.assertEqual(next(ff_it).idx(), 3)
+        with self.assertRaises(StopIteration):
+            next(ff_it)
 
     def test_face_face_iter_without_holes(self):
         # Add some vertices
@@ -147,7 +149,7 @@ class TrimeshCirculatorFaceFace(unittest.TestCase):
         face_iter = self.mesh.ff(fh1)
 
         # Get the face via the handle
-        faceHandle1 = face_iter.__next__()
+        faceHandle1 = next(face_iter)
         face1 = self.mesh.face(faceHandle1)
         
         self.assertEqual(faceHandle1.idx(), 1)

tests/test_trimesh_circulator_face_halfedge.py

@@ -41,10 +41,11 @@ class TriMeshCirculatorFaceHalfEdge(unittest.TestCase):
     def test_face_halfedge_iter_without_holes_increment(self):
         # Iterate around face 1 at the middle
         fh_it = openmesh.FaceHalfedgeIter(self.mesh, self.mesh.face_handle(1))
-        self.assertEqual(fh_it.__next__().idx(), 8)
-        self.assertEqual(fh_it.__next__().idx(), 3)
-        self.assertEqual(fh_it.__next__().idx(), 6)
-        self.assertRaises(StopIteration, fh_it.__next__)
+        self.assertEqual(next(fh_it).idx(), 8)
+        self.assertEqual(next(fh_it).idx(), 3)
+        self.assertEqual(next(fh_it).idx(), 6)
+        with self.assertRaises(StopIteration):
+            next(fh_it)
 
 
 if __name__ == '__main__':

tests/test_trimesh_circulator_face_vertex.py

@@ -39,10 +39,11 @@ class TriMeshCirculatorFaceVertex(unittest.TestCase):
     
         # Iterate around face 0 at the top
         fv_it = openmesh.FaceVertexIter(self.mesh, self.fh0)
-        self.assertEqual(fv_it.__next__().idx(), 0)
-        self.assertEqual(fv_it.__next__().idx(), 1)
-        self.assertEqual(fv_it.__next__().idx(), 2)
-        self.assertRaises(StopIteration, fv_it.__next__)
+        self.assertEqual(next(fv_it).idx(), 0)
+        self.assertEqual(next(fv_it).idx(), 1)
+        self.assertEqual(next(fv_it).idx(), 2)
+        with self.assertRaises(StopIteration):
+            next(fv_it)
         
 
 if __name__ == '__main__':

tests/test_trimesh_circulator_halfedge_loop.py

@@ -66,10 +66,11 @@ class TrimeshCirculatorHalfedgeLoop(unittest.TestCase):
         # Circle around face 1
         hl_it = self.mesh.hl(self.mesh.halfedge_handle(3))
 
-        self.assertEqual(hl_it.__next__().idx(), 3)
-        self.assertEqual(hl_it.__next__().idx(), 6)
-        self.assertEqual(hl_it.__next__().idx(), 8)
-        self.assertRaises(StopIteration, hl_it.__next__)
+        self.assertEqual(next(hl_it).idx(), 3)
+        self.assertEqual(next(hl_it).idx(), 6)
+        self.assertEqual(next(hl_it).idx(), 8)
+        with self.assertRaises(StopIteration):
+            next(hl_it)
 
     def test_halfedge_loop_without_face(self):
         # Add some vertices
@@ -122,10 +123,11 @@ class TrimeshCirculatorHalfedgeLoop(unittest.TestCase):
         # Circle around the hole
         hl_it = self.mesh.hl(self.mesh.halfedge_handle(3))
 
-        self.assertEqual(hl_it.__next__().idx(), 3)
-        self.assertEqual(hl_it.__next__().idx(), 17)
-        self.assertEqual(hl_it.__next__().idx(), 7)
-        self.assertRaises(StopIteration, hl_it.__next__)
+        self.assertEqual(next(hl_it).idx(), 3)
+        self.assertEqual(next(hl_it).idx(), 17)
+        self.assertEqual(next(hl_it).idx(), 7)
+        with self.assertRaises(StopIteration):
+            next(hl_it)
 
 
 if __name__ == '__main__':

tests/test_trimesh_circulator_vertex_edge.py

@@ -37,19 +37,21 @@ class TriMeshCirculatorVertexEdge(unittest.TestCase):
     def test_vertex_edge_iter_without_holes_increment(self):
         # Iterate around vertex 1 at the middle
         ve_it = openmesh.VertexEdgeIter(self.mesh, self.vhandle[1])
-        self.assertEqual(ve_it.__next__().idx(), 5)
-        self.assertEqual(ve_it.__next__().idx(), 3)
-        self.assertEqual(ve_it.__next__().idx(), 0)
-        self.assertEqual(ve_it.__next__().idx(), 1)
-        self.assertRaises(StopIteration, ve_it.__next__)
+        self.assertEqual(next(ve_it).idx(), 5)
+        self.assertEqual(next(ve_it).idx(), 3)
+        self.assertEqual(next(ve_it).idx(), 0)
+        self.assertEqual(next(ve_it).idx(), 1)
+        with self.assertRaises(StopIteration):
+            next(ve_it)
         
     def test_vertex_edge_iter_boundary_increment(self):
         # Iterate around vertex 2 at the boundary
         ve_it = openmesh.VertexEdgeIter(self.mesh, self.vhandle[2])
-        self.assertEqual(ve_it.__next__().idx(), 7)
-        self.assertEqual(ve_it.__next__().idx(), 1)
-        self.assertEqual(ve_it.__next__().idx(), 2)
-        self.assertRaises(StopIteration, ve_it.__next__)
+        self.assertEqual(next(ve_it).idx(), 7)
+        self.assertEqual(next(ve_it).idx(), 1)
+        self.assertEqual(next(ve_it).idx(), 2)
+        with self.assertRaises(StopIteration):
+            next(ve_it)
 
 
 if __name__ == '__main__':

tests/test_trimesh_circulator_vertex_face.py

@@ -35,9 +35,10 @@ class TriMeshCirculatorVertexFace(unittest.TestCase):
 
         # Iterate around vertex 1 at the middle (with holes in between)
         vf_it = openmesh.VertexFaceIter(self.mesh, self.vhandle[1])
-        self.assertEqual(vf_it.__next__().idx(), 0)
-        self.assertEqual(vf_it.__next__().idx(), 1)
-        self.assertRaises(StopIteration, vf_it.__next__)
+        self.assertEqual(next(vf_it).idx(), 0)
+        self.assertEqual(next(vf_it).idx(), 1)
+        with self.assertRaises(StopIteration):
+            next(vf_it)
 
     def test_vertex_face_iter_without_holes_increment(self):
         # Add four faces
@@ -59,11 +60,12 @@ class TriMeshCirculatorVertexFace(unittest.TestCase):
         
         # Iterate around vertex 1 at the middle (without holes in between)
         vf_it = openmesh.VertexFaceIter(self.mesh, self.vhandle[1])
-        self.assertEqual(vf_it.__next__().idx(), 3)
-        self.assertEqual(vf_it.__next__().idx(), 1)
-        self.assertEqual(vf_it.__next__().idx(), 2)
-        self.assertEqual(vf_it.__next__().idx(), 0)
-        self.assertRaises(StopIteration, vf_it.__next__)
+        self.assertEqual(next(vf_it).idx(), 3)
+        self.assertEqual(next(vf_it).idx(), 1)
+        self.assertEqual(next(vf_it).idx(), 2)
+        self.assertEqual(next(vf_it).idx(), 0)
+        with self.assertRaises(StopIteration):
+            next(vf_it)
         
     def test_vertex_face_iter_boundary_increment(self):
         # Add four faces
@@ -85,9 +87,10 @@ class TriMeshCirculatorVertexFace(unittest.TestCase):
         
         # Iterate around vertex 2 at the boundary (without holes in between)
         vf_it = openmesh.VertexFaceIter(self.mesh, self.vhandle[2])
-        self.assertEqual(vf_it.__next__().idx(), 3)
-        self.assertEqual(vf_it.__next__().idx(), 0)
-        self.assertRaises(StopIteration, vf_it.__next__)
+        self.assertEqual(next(vf_it).idx(), 3)
+        self.assertEqual(next(vf_it).idx(), 0)
+        with self.assertRaises(StopIteration):
+            next(vf_it)
 
 
 if __name__ == '__main__':

tests/test_trimesh_circulator_vertex_ihalfedge.py

@@ -38,38 +38,40 @@ class TriMeshCirculatorVertexIHalfEdge(unittest.TestCase):
     def test_vertex_incoming_halfedge_without_holes_increment(self):
         # Iterate around vertex 1 at the middle
         vih_it = openmesh.VertexIHalfedgeIter(self.mesh, self.vhandle[1])
-        heh = vih_it.__next__()
+        heh = next(vih_it)
         self.assertEqual(heh.idx(), 10)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 1)
-        heh = vih_it.__next__()
+        heh = next(vih_it)
         self.assertEqual(heh.idx(), 7)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 2)
-        heh = vih_it.__next__()
+        heh = next(vih_it)
         self.assertEqual(heh.idx(), 0)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 0)
-        heh = vih_it.__next__()
+        heh = next(vih_it)
         self.assertEqual(heh.idx(), 3)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 3)
-        self.assertRaises(StopIteration, vih_it.__next__)
+        with self.assertRaises(StopIteration):
+            next(vih_it)
         
     def test_vertex_incoming_halfedge_boundary_increment(self):
         # Iterate around vertex 2 at the boundary
         vih_it = openmesh.VertexIHalfedgeIter(self.mesh, self.vhandle[2])
-        heh = vih_it.__next__()
+        heh = next(vih_it)
         self.assertEqual(heh.idx(), 14)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 3)
-        heh = vih_it.__next__()
+        heh = next(vih_it)
         self.assertEqual(heh.idx(), 2)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 0)
-        heh = vih_it.__next__()
+        heh = next(vih_it)
         self.assertEqual(heh.idx(), 5)
         self.assertEqual(self.mesh.face_handle(heh).idx(), -1)
-        self.assertRaises(StopIteration, vih_it.__next__)
+        with self.assertRaises(StopIteration):
+            next(vih_it)
         
     def test_vertex_incoming_halfedge_dereference_increment(self):
         # Iterate around vertex 1 at the middle
         vih_it = openmesh.VertexIHalfedgeIter(self.mesh, self.vhandle[1])
-        heh = vih_it.__next__()
+        heh = next(vih_it)
         eh = self.mesh.edge_handle(heh)
         vh = self.mesh.to_vertex_handle(heh)
         self.assertEqual(heh.idx(), 10)

tests/test_trimesh_circulator_vertex_ohalfedge.py

@@ -38,38 +38,40 @@ class TriMeshCirculatorVertexOHalfEdge(unittest.TestCase):
     def test_vertex_outgoing_halfedge_without_holes_increment(self):
         # Iterate around vertex 1 at the middle
         voh_it = openmesh.VertexOHalfedgeIter(self.mesh, self.vhandle[1])
-        heh = voh_it.__next__()
+        heh = next(voh_it)
         self.assertEqual(heh.idx(), 11)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 3)
-        heh = voh_it.__next__()
+        heh = next(voh_it)
         self.assertEqual(heh.idx(), 6)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 1)
-        heh = voh_it.__next__()
+        heh = next(voh_it)
         self.assertEqual(heh.idx(), 1)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 2)
-        heh = voh_it.__next__()
+        heh = next(voh_it)
         self.assertEqual(heh.idx(), 2)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 0)
-        self.assertRaises(StopIteration, voh_it.__next__)
+        with self.assertRaises(StopIteration):
+            next(voh_it)
         
     def test_vertex_outgoing_halfedge_boundary_increment(self):
         # Iterate around vertex 2 at the boundary
         voh_it = openmesh.VertexOHalfedgeIter(self.mesh, self.vhandle[2])
-        heh = voh_it.__next__()
+        heh = next(voh_it)
         self.assertEqual(heh.idx(), 15)
         self.assertEqual(self.mesh.face_handle(heh).idx(), -1)
-        heh = voh_it.__next__()
+        heh = next(voh_it)
         self.assertEqual(heh.idx(), 3)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 3)
-        heh = voh_it.__next__()
+        heh = next(voh_it)
         self.assertEqual(heh.idx(), 4)
         self.assertEqual(self.mesh.face_handle(heh).idx(), 0)
-        self.assertRaises(StopIteration, voh_it.__next__)
+        with self.assertRaises(StopIteration):
+            next(voh_it)
         
     def test_vertex_outgoing_halfedge_dereference_increment(self):
         # Iterate around vertex 1 at the middle
         voh_it = openmesh.VertexOHalfedgeIter(self.mesh, self.vhandle[1])
-        heh = voh_it.__next__()
+        heh = next(voh_it)
         eh = self.mesh.edge_handle(heh)
         vh = self.mesh.to_vertex_handle(heh)
         self.assertEqual(heh.idx(), 11)

tests/test_trimesh_circulator_vertex_vertex.py

@@ -38,19 +38,21 @@ class TriMeshCirculatorVertexVertex(unittest.TestCase):
     def test_vertex_vertex_increment(self):
         # Iterate around vertex 1 at the middle
         vv_it = openmesh.VertexVertexIter(self.mesh, self.vhandle[1])
-        self.assertEqual(vv_it.__next__().idx(), 4)
-        self.assertEqual(vv_it.__next__().idx(), 3)
-        self.assertEqual(vv_it.__next__().idx(), 0)
-        self.assertEqual(vv_it.__next__().idx(), 2)
-        self.assertRaises(StopIteration, vv_it.__next__)
+        self.assertEqual(next(vv_it).idx(), 4)
+        self.assertEqual(next(vv_it).idx(), 3)
+        self.assertEqual(next(vv_it).idx(), 0)
+        self.assertEqual(next(vv_it).idx(), 2)
+        with self.assertRaises(StopIteration):
+            next(vv_it)
 
     def test_vertex_vertex_boundary_increment(self):
         # Iterate around vertex 2 at the boundary
         vv_it = openmesh.VertexVertexIter(self.mesh, self.vhandle[2])
-        self.assertEqual(vv_it.__next__().idx(), 4)
-        self.assertEqual(vv_it.__next__().idx(), 1)
-        self.assertEqual(vv_it.__next__().idx(), 0)
-        self.assertRaises(StopIteration, vv_it.__next__)
+        self.assertEqual(next(vv_it).idx(), 4)
+        self.assertEqual(next(vv_it).idx(), 1)
+        self.assertEqual(next(vv_it).idx(), 0)
+        with self.assertRaises(StopIteration):
+            next(vv_it)
 
 
 if __name__ == '__main__':

tests/test_trimesh_collapse.py

@@ -197,15 +197,15 @@ class Collapse(unittest.TestCase):
 
         fv_it = self.mesh.fv(fh_1)
 
-        self.assertTrue(fv_it.__next__().idx(), 1)
-        self.assertTrue(fv_it.__next__().idx(), 2)
-        self.assertTrue(fv_it.__next__().idx(), 3)
+        self.assertEqual(next(fv_it).idx(), 1)
+        self.assertEqual(next(fv_it).idx(), 2)
+        self.assertEqual(next(fv_it).idx(), 3)
 
         fv_it = self.mesh.fv(fh_2)
 
-        self.assertTrue(fv_it.__next__().idx(), 2)
-        self.assertTrue(fv_it.__next__().idx(), 1)
-        self.assertTrue(fv_it.__next__().idx(), 3)
+        self.assertEqual(next(fv_it).idx(), 2)
+        self.assertEqual(next(fv_it).idx(), 1