moved import constants to bottom; it's something like this

esmf_regrid/tests/integration/esmf_regridder/test_Regridder.py

@@ -4,7 +4,7 @@
 from numpy import ma
 
 from esmf_regrid import esmpy
-from .... import Constants
+from esmf_regrid import Constants
 from esmf_regrid.esmf_regridder import GridInfo, Regridder
 from esmf_regrid.tests import make_grid_args
 

esmf_regrid/tests/unit/esmf_regridder/test_Regridder.py

@@ -5,7 +5,7 @@
 import pytest
 import scipy.sparse
 
-from .... import Constants
+from esmf_regrid import Constants
 from esmf_regrid.esmf_regridder import GridInfo, Regridder
 from esmf_regrid.tests import make_grid_args
 

esmf_regrid/tests/unit/experimental/io/test_round_tripping.py

@@ -3,7 +3,6 @@
 import numpy as np
 from numpy import ma
 import pytest
-from ..... import Constants
 
 from esmf_regrid.experimental.io import load_regridder, save_regridder
 from esmf_regrid.experimental.unstructured_scheme import (
@@ -17,6 +16,7 @@
 from esmf_regrid.tests.unit.schemes.test__mesh_to_MeshInfo import (
     _gridlike_mesh_cube,
 )
+from esmf_regrid import Constants
 
 
 def _make_grid_to_mesh_regridder(

esmf_regrid/tests/unit/experimental/unstructured_regrid/test_MeshInfo.py

@@ -3,11 +3,11 @@
 import numpy as np
 from numpy import ma
 
-from ..... import Constants
 from esmf_regrid.esmf_regridder import GridInfo, Regridder
 from esmf_regrid.experimental.unstructured_regrid import MeshInfo
 from esmf_regrid.tests import get_result_path, make_grid_args
 
+from esmf_regrid import Constants
 
 def _make_small_mesh_args():
     ugrid_node_coords = np.array(
@@ -112,9 +112,7 @@ def test_regrid_bilinear_with_mesh():
     grid_args = [ar * 2 for ar in make_grid_args(2, 3)]
     grid = GridInfo(*grid_args, center=True)
 
-    mesh_to_grid_regridder = Regridder(
-        node_mesh, grid, method=Constants.Method.BILINEAR
-    )
+    mesh_to_grid_regridder = Regridder(node_mesh, grid, method=Constants.Method.BILINEAR)
     mesh_input = np.arange(5)
     grid_output = mesh_to_grid_regridder.regrid(mesh_input)
     # For a flat surface, we would expect the fractional part of these values
@@ -135,17 +133,13 @@ def test_regrid_bilinear_with_mesh():
     expected_grid_output = ma.array(expected_grid_output, mask=expected_grid_mask)
     assert ma.allclose(expected_grid_output, grid_output)
 
-    grid_to_mesh_regridder = Regridder(
-        grid, node_mesh, method=Constants.Method.BILINEAR
-    )
+    grid_to_mesh_regridder = Regridder(grid, node_mesh, method=Constants.Method.BILINEAR)
     grid_input = np.array([[0, 0], [1, 0], [2, 1]])
     mesh_output = grid_to_mesh_regridder.regrid(grid_input)
     expected_mesh_output = ma.array([0.0, 1.5, 0.0, 0.5, -1], mask=[0, 0, 0, 0, 1])
     assert ma.allclose(expected_mesh_output, mesh_output)
 
-    grid_to_face_mesh_regridder = Regridder(
-        grid, face_mesh, method=Constants.Method.BILINEAR
-    )
+    grid_to_face_mesh_regridder = Regridder(grid, face_mesh, method=Constants.Method.BILINEAR)
     grid_input_2 = np.array([[0, 0], [1, 0], [4, 1]])
     face_mesh_output = grid_to_face_mesh_regridder.regrid(grid_input_2)
     expected_face_mesh_output = np.array([0.0, 1.4888258584989558])

esmf_regrid/tests/unit/experimental/unstructured_scheme/test_GridToMeshESMFRegridder.py

@@ -7,7 +7,6 @@
 from numpy import ma
 import pytest
 
-from ..... import Constants
 from esmf_regrid.experimental.unstructured_scheme import (
     GridToMeshESMFRegridder,
 )
@@ -22,7 +21,7 @@
 from esmf_regrid.tests.unit.schemes.test__regrid_unstructured_to_rectilinear__prepare import (
     _flat_mesh_cube,
 )
-
+from esmf_regrid import Constants
 
 def _add_metadata(cube):
     result = cube.copy()

esmf_regrid/tests/unit/experimental/unstructured_scheme/test_MeshToGridESMFRegridder.py

@@ -6,7 +6,6 @@
 import numpy as np
 import pytest
 
-from ..... import Constants
 from esmf_regrid.experimental.unstructured_scheme import (
     MeshToGridESMFRegridder,
 )
@@ -22,6 +21,7 @@
     _flat_mesh_cube,
     _full_mesh,
 )
+from esmf_regrid import Constants
 
 
 def _add_metadata(cube):

esmf_regrid/tests/unit/experimental/unstructured_scheme/test_regrid_rectilinear_to_unstructured.py

@@ -6,7 +6,6 @@
 from numpy import ma
 import pytest
 
-from ..... import Constants
 from esmf_regrid.experimental.unstructured_scheme import (
     regrid_rectilinear_to_unstructured,
 )
@@ -19,7 +18,7 @@
 from esmf_regrid.tests.unit.schemes.test__regrid_unstructured_to_rectilinear__prepare import (
     _flat_mesh_cube,
 )
-
+from esmf_regrid import Constants
 
 def _add_metadata(cube):
     result = cube.copy()

esmf_regrid/tests/unit/experimental/unstructured_scheme/test_regrid_unstructured_to_rectilinear.py

@@ -5,7 +5,6 @@
 import numpy as np
 import pytest
 
-from ..... import Constants
 from esmf_regrid.experimental.unstructured_scheme import (
     regrid_unstructured_to_rectilinear,
 )
@@ -19,7 +18,7 @@
     _flat_mesh_cube,
     _full_mesh,
 )
-
+from esmf_regrid import Constants
 
 def _add_metadata(cube):
     result = cube.copy()
@@ -65,9 +64,7 @@ def test_flat_cubes():
     assert expected_cube == result
 
 
-@pytest.mark.parametrize(
-    "method", (Constants.Method.BILINEAR, Constants.Method.NEAREST)
-)
+@pytest.mark.parametrize("method", (Constants.Method.BILINEAR, Constants.Method.NEAREST))
 def test_node_friendly_methods(method):
     """
     Basic test for :func:`esmf_regrid.experimental.unstructured_scheme.regrid_unstructured_to_rectilinear`.
@@ -115,35 +112,25 @@ def test_invalid_args():
     tgt = _grid_cube(n_lons, n_lats, lon_bounds, lat_bounds, circular=True)
 
     with pytest.raises(ValueError):
-        _ = regrid_unstructured_to_rectilinear(
-            tgt, tgt, method=Constants.Method.BILINEAR
-        )
+        _ = regrid_unstructured_to_rectilinear(tgt, tgt, method=Constants.Method.BILINEAR)
     with pytest.raises(NotImplementedError):
-        _ = regrid_unstructured_to_rectilinear(
-            face_src, tgt, method=Constants.Method.NEAREST
-        )
+        _ = regrid_unstructured_to_rectilinear(face_src, tgt, method=Constants.Method.NEAREST)
     with pytest.raises(ValueError) as excinfo:
-        _ = regrid_unstructured_to_rectilinear(
-            node_src, tgt, method=Constants.Method.CONSERVATIVE
-        )
+        _ = regrid_unstructured_to_rectilinear(node_src, tgt, method=Constants.Method.CONSERVATIVE)
     expected_message = (
         "Conservative regridding requires a source cube located on "
         "the face of a cube, target cube had the node location."
     )
     assert expected_message in str(excinfo.value)
     with pytest.raises(ValueError) as excinfo:
-        _ = regrid_unstructured_to_rectilinear(
-            edge_src, tgt, method=Constants.Method.BILINEAR
-        )
+        _ = regrid_unstructured_to_rectilinear(edge_src, tgt, method=Constants.Method.BILINEAR)
     expected_message = (
         "bilinear regridding requires a source cube with a node "
         "or face location, target cube had the edge location."
     )
     assert expected_message in str(excinfo.value)
     with pytest.raises(ValueError) as excinfo:
-        _ = regrid_unstructured_to_rectilinear(
-            edge_src, tgt, method=Constants.Method.NEAREST
-        )
+        _ = regrid_unstructured_to_rectilinear(edge_src, tgt, method=Constants.Method.NEAREST)
     expected_message = (
         "nearest regridding requires a source cube with a node "
         "or face location, target cube had the edge location."

esmf_regrid/tests/unit/schemes/test__regrid_unstructured_to_rectilinear__prepare.py

@@ -4,7 +4,6 @@
 from iris.cube import Cube
 import numpy as np
 
-from .... import Constants
 from esmf_regrid.esmf_regridder import GridInfo
 from esmf_regrid.experimental.unstructured_regrid import MeshInfo
 from esmf_regrid.schemes import (
@@ -16,7 +15,7 @@
 from esmf_regrid.tests.unit.schemes.test__mesh_to_MeshInfo import (
     _example_mesh,
 )
-
+from esmf_regrid import Constants
 
 def _full_mesh():
     mesh = _example_mesh()