Fix some minor codacy issues

Author: mikaem

examples/darray.py

@@ -1,7 +1,6 @@
 import numpy as np
 from mpi4py import MPI
-from mpi4py_fft.pencil import Subcomm
-from mpi4py_fft.distarray import DistArray, newDistArray, Function
+from mpi4py_fft.distarray import DistArray, newDistArray
 from mpi4py_fft.mpifft import PFFT
 
 # Test DistArray. Start with alignment in axis 0, then tranfer to 2 and

mpi4py_fft/io/nc_file.py

@@ -1,5 +1,4 @@
 import os
-import copy
 import numpy as np
 from mpi4py import MPI
 from .file_base import FileBase

tests/test_darray.py

@@ -22,10 +22,10 @@ def test_2Darray():
             a = DistArray(M, subcomm=subcomm, val=1, rank=rank, alignment=alignment)
             assert a.rank == rank
             assert a.global_shape == M
-            s = a.substart
+            _ = a.substart
             c = a.subcomm
             z = a.commsizes
-            p = a.pencil
+            _ = a.pencil
             assert np.prod(np.array(z)) == comm.Get_size()
             if rank > 0:
                 a0 = a[0]
@@ -41,9 +41,9 @@ def test_2Darray():
             if comm.Get_rank() == 0:
                 assert len(k) == N[0]
                 assert np.sum(k) == N[0]
-            ls = a.local_slice()
+            _ = a.local_slice()
             newaxis = (a.alignment+1)%2
-            p0, t = a.get_pencil_and_transfer(newaxis)
+            _ = a.get_pencil_and_transfer(newaxis)
             a[:] = MPI.COMM_WORLD.Get_rank()
             b = a.redistribute(newaxis)
             a = b.redistribute(out=a)
@@ -66,10 +66,10 @@ def test_3Darray():
             a = DistArray(M, subcomm=subcomm, val=1, rank=rank, alignment=alignment)
             assert a.rank == rank
             assert a.global_shape == M
-            s = a.substart
-            c = a.subcomm
+            _ = a.substart
+            _ = a.subcomm
             z = a.commsizes
-            p = a.pencil
+            _ = a.pencil
             assert np.prod(np.array(z)) == comm.Get_size()
             if rank > 0:
                 a0 = a[0]
@@ -89,9 +89,9 @@ def test_3Darray():
             if comm.Get_rank() == 0:
                 assert len(k) == N[0]
                 assert np.sum(k) == N[0]
-            ls = a.local_slice()
+            _ = a.local_slice()
             newaxis = (a.alignment+1)%3
-            p0, t = a.get_pencil_and_transfer(newaxis)
+            _ = a.get_pencil_and_transfer(newaxis)
             a[:] = MPI.COMM_WORLD.Get_rank()
             b = a.redistribute(newaxis)
             a = b.redistribute(out=a)

tests/test_io.py

@@ -58,7 +58,7 @@ def test_2D(backend, forward_output):
             assert np.allclose(u0, u)
             if backend == 'netcdf4': # Test opening file in mode 'a' when not existing
                 remove_if_exists('nctesta.nc')
-                ncfile = NCFile('nctesta.nc', domain=domain, mode='a')
+                _ = NCFile('nctesta.nc', domain=domain, mode='a')
     T.destroy()
 
 def test_3D(backend, forward_output):

tests/test_mpifft.py

@@ -4,7 +4,7 @@
 from mpi4py import MPI
 from mpi4py_fft.mpifft import PFFT
 from mpi4py_fft.pencil import Subcomm
-from mpi4py_fft.distarray import DistArray, newDistArray
+from mpi4py_fft.distarray import newDistArray
 from mpi4py_fft import fftw
 
 backends = ['fftw']