From 72f4106a031c3483bdc2e6449c778cc3bd506e80 Mon Sep 17 00:00:00 2001
From: Holger Kohr <ho.kohr@zoho.com>
Date: Tue, 13 Mar 2018 22:28:06 +0100
Subject: [PATCH] MAINT: sort imports in contrib

---
 odl/contrib/datasets/ct/fips.py                          | 3 ++-
 odl/contrib/datasets/images/cambridge.py                 | 1 +
 odl/contrib/datasets/images/examples/cambridge_images.py | 3 ++-
 odl/contrib/datasets/mri/tugraz.py                       | 3 ++-
 odl/contrib/datasets/util.py                             | 9 +++++----
 odl/contrib/fom/examples/haarpsi.py                      | 1 +
 odl/contrib/fom/examples/noise_power_spectrum.py         | 1 +
 odl/contrib/fom/examples/supervised_comparison.py        | 5 +++--
 odl/contrib/fom/supervised.py                            | 1 +
 odl/contrib/fom/test/test_supervised.py                  | 4 +++-
 odl/contrib/fom/test/test_unsupervised.py                | 1 +
 odl/contrib/fom/unsupervised.py                          | 1 +
 odl/contrib/mrc/examples/mrc_io.py                       | 6 +++---
 odl/contrib/mrc/examples/raw_binary_with_header_io.py    | 4 ++--
 odl/contrib/mrc/mrc.py                                   | 9 +++++----
 odl/contrib/mrc/test/mrc_test.py                         | 9 +++++----
 odl/contrib/mrc/test/uncompr_bin_test.py                 | 7 ++++---
 odl/contrib/mrc/uncompr_bin.py                           | 9 +++++----
 odl/contrib/pyshearlab/pyshearlab_operator.py            | 7 ++++---
 odl/contrib/pyshearlab/test/operator_test.py             | 4 ++--
 odl/contrib/solvers/examples/tomography_nonlocalmeans.py | 2 +-
 .../solvers/functional/nonlocalmeans_functionals.py      | 3 ++-
 .../tensorflow/examples/tensorflow_layer_matrix.py       | 3 ++-
 .../tensorflow/examples/tensorflow_layer_productspace.py | 3 ++-
 .../examples/tensorflow_layer_ray_transform.py           | 4 +++-
 .../tensorflow/examples/tensorflow_operator_matrix.py    | 4 +++-
 odl/contrib/tensorflow/examples/tensorflow_tomography.py | 3 ++-
 odl/contrib/tensorflow/layer.py                          | 8 +++++---
 odl/contrib/tensorflow/operator.py                       | 6 +++---
 odl/contrib/tensorflow/space.py                          | 7 +++----
 odl/contrib/tensorflow/test/tensorflow_test.py           | 6 ++++--
 odl/contrib/theano/examples/theano_layer_matrix.py       | 6 ++++--
 odl/contrib/theano/layer.py                              | 7 +++----
 odl/contrib/theano/test/theano_test.py                   | 7 ++++---
 odl/contrib/tomo/elekta.py                               | 2 +-
 .../examples/elekta_icon_algebraic_reconstruction.py     | 1 +
 .../tomo/examples/elekta_xvi_algebraic_reconstruction.py | 1 +
 odl/contrib/torch/examples/operator_autograd.py          | 4 +++-
 odl/contrib/torch/examples/operator_module.py            | 4 ++--
 odl/contrib/torch/operator.py                            | 2 ++
 odl/contrib/torch/test/test_operator.py                  | 5 ++---
 41 files changed, 106 insertions(+), 70 deletions(-)

diff --git a/odl/contrib/datasets/ct/fips.py b/odl/contrib/datasets/ct/fips.py
index 7b07b4ffe90..80b8c094add 100644
--- a/odl/contrib/datasets/ct/fips.py
+++ b/odl/contrib/datasets/ct/fips.py
@@ -9,12 +9,13 @@
 """Tomographic datasets from the Finish Inverse Problems Society (FIPS)."""
 
 from __future__ import division
+
 import numpy as np
+
 from odl.contrib.datasets.util import get_data
 from odl.discr import uniform_partition
 from odl.tomo import FanFlatGeometry
 
-
 __all__ = ('walnut_data', 'walnut_geometry',
            'lotus_root_data', 'lotus_root_geometry')
 
diff --git a/odl/contrib/datasets/images/cambridge.py b/odl/contrib/datasets/images/cambridge.py
index 28a4bf06d9d..0e2cabef708 100644
--- a/odl/contrib/datasets/images/cambridge.py
+++ b/odl/contrib/datasets/images/cambridge.py
@@ -9,6 +9,7 @@
 """Images provided by the University of Cambridge."""
 
 import numpy as np
+
 import skimage.transform
 from odl.contrib.datasets.util import get_data
 
diff --git a/odl/contrib/datasets/images/examples/cambridge_images.py b/odl/contrib/datasets/images/examples/cambridge_images.py
index 542382e3f60..2d410680ce0 100644
--- a/odl/contrib/datasets/images/examples/cambridge_images.py
+++ b/odl/contrib/datasets/images/examples/cambridge_images.py
@@ -1,8 +1,9 @@
 """Example of the Cambridge images."""
 
-import odl.contrib.datasets.images as images
 import numpy as np
+
 import odl
+import odl.contrib.datasets.images as images
 
 
 def convert_to_odl(image):
diff --git a/odl/contrib/datasets/mri/tugraz.py b/odl/contrib/datasets/mri/tugraz.py
index 8839ff26705..6f19eb2d012 100644
--- a/odl/contrib/datasets/mri/tugraz.py
+++ b/odl/contrib/datasets/mri/tugraz.py
@@ -11,8 +11,9 @@
 import numpy as np
 from pkg_resources import parse_version
 
-from odl.contrib.datasets.util import get_data
 import odl
+from odl.contrib.datasets.util import get_data
+
 if parse_version(np.__version__) < parse_version('1.12'):
     flip = odl.util.npy_compat.flip
 else:
diff --git a/odl/contrib/datasets/util.py b/odl/contrib/datasets/util.py
index cfcf5f359bf..3a6311d14f9 100644
--- a/odl/contrib/datasets/util.py
+++ b/odl/contrib/datasets/util.py
@@ -9,13 +9,14 @@
 """Utilities for datasets."""
 
 from __future__ import print_function
+
+import contextlib
 import os
-from os.path import join, expanduser, exists
-from future.moves.urllib.request import urlopen
+from os.path import exists, expanduser, join
 from shutil import copyfileobj, rmtree
-from scipy import io
-import contextlib
 
+from future.moves.urllib.request import urlopen
+from scipy import io
 
 __all__ = ('get_data_dir', 'cleanup_data_dir', 'get_data')
 
diff --git a/odl/contrib/fom/examples/haarpsi.py b/odl/contrib/fom/examples/haarpsi.py
index 4c2bd42ae78..5e271213f4b 100644
--- a/odl/contrib/fom/examples/haarpsi.py
+++ b/odl/contrib/fom/examples/haarpsi.py
@@ -3,6 +3,7 @@
 import matplotlib.pyplot as plt
 import numpy as np
 import scipy.misc
+
 from odl.contrib import fom
 
 # --- Generate images --- #
diff --git a/odl/contrib/fom/examples/noise_power_spectrum.py b/odl/contrib/fom/examples/noise_power_spectrum.py
index b0208a7be33..9376efcb46d 100644
--- a/odl/contrib/fom/examples/noise_power_spectrum.py
+++ b/odl/contrib/fom/examples/noise_power_spectrum.py
@@ -1,6 +1,7 @@
 """Simple example of noise power spectrum (NPS)."""
 
 import numpy as np
+
 import odl
 from odl.contrib import fom
 
diff --git a/odl/contrib/fom/examples/supervised_comparison.py b/odl/contrib/fom/examples/supervised_comparison.py
index 166aa02a4f0..b7ba8503f89 100644
--- a/odl/contrib/fom/examples/supervised_comparison.py
+++ b/odl/contrib/fom/examples/supervised_comparison.py
@@ -7,10 +7,11 @@
 
 """
 
+import matplotlib.pyplot as plt
+import numpy as np
+
 import odl
 from odl.contrib import fom
-import numpy as np
-import matplotlib.pyplot as plt
 
 # Discrete space: discretized functions on the rectangle
 # [-20, 20]^2 with 100 samples per dimension.
diff --git a/odl/contrib/fom/supervised.py b/odl/contrib/fom/supervised.py
index 0e3ca404553..17b0a037e6f 100644
--- a/odl/contrib/fom/supervised.py
+++ b/odl/contrib/fom/supervised.py
@@ -9,6 +9,7 @@
 """Figures of merit (FOMs) for comparison against a known ground truth."""
 
 from __future__ import division
+
 import numpy as np
 
 import odl
diff --git a/odl/contrib/fom/test/test_supervised.py b/odl/contrib/fom/test/test_supervised.py
index 3404e175d60..b30ff9e8f7e 100644
--- a/odl/contrib/fom/test/test_supervised.py
+++ b/odl/contrib/fom/test/test_supervised.py
@@ -9,10 +9,12 @@
 """Tests for supervised FoMs."""
 
 from __future__ import division
+
 import numpy as np
 import pytest
-import scipy.signal
 import scipy.misc
+import scipy.signal
+
 import odl
 import odl.contrib.fom
 from odl.contrib.fom.util import filter_image_sep2d
diff --git a/odl/contrib/fom/test/test_unsupervised.py b/odl/contrib/fom/test/test_unsupervised.py
index e1179229dfc..0a09876add7 100644
--- a/odl/contrib/fom/test/test_unsupervised.py
+++ b/odl/contrib/fom/test/test_unsupervised.py
@@ -10,6 +10,7 @@
 
 import numpy as np
 import pytest
+
 import odl
 import odl.contrib.fom
 
diff --git a/odl/contrib/fom/unsupervised.py b/odl/contrib/fom/unsupervised.py
index 7bf1a014f76..b21c1c651a3 100644
--- a/odl/contrib/fom/unsupervised.py
+++ b/odl/contrib/fom/unsupervised.py
@@ -9,6 +9,7 @@
 """Figures of Merit (FOMs) for measuring image quality without a reference."""
 
 from __future__ import division
+
 import numpy as np
 
 __all__ = ('estimate_noise_std',)
diff --git a/odl/contrib/mrc/examples/mrc_io.py b/odl/contrib/mrc/examples/mrc_io.py
index 0b7433b2a83..f445284f9a4 100644
--- a/odl/contrib/mrc/examples/mrc_io.py
+++ b/odl/contrib/mrc/examples/mrc_io.py
@@ -12,15 +12,15 @@
 
 from __future__ import print_function
 
-import matplotlib.pyplot as plt
-import numpy as np
 import os
 import tempfile
 
+import matplotlib.pyplot as plt
+import numpy as np
+
 from odl.contrib.mrc import (
     FileReaderMRC, FileWriterMRC, mrc_header_from_params)
 
-
 # --- Reading --- #
 
 file_path = os.path.join(os.path.dirname(os.path.abspath(__file__)),
diff --git a/odl/contrib/mrc/examples/raw_binary_with_header_io.py b/odl/contrib/mrc/examples/raw_binary_with_header_io.py
index 5312a0af535..8305d94ffbe 100644
--- a/odl/contrib/mrc/examples/raw_binary_with_header_io.py
+++ b/odl/contrib/mrc/examples/raw_binary_with_header_io.py
@@ -12,16 +12,16 @@
 sequence of dictionaries with a certain structure.
 """
 
+import tempfile
 from collections import OrderedDict
+
 import matplotlib.pyplot as plt
 import numpy as np
 import scipy
-import tempfile
 
 from odl.contrib.mrc import (
     FileReaderRawBinaryWithHeader, FileWriterRawBinaryWithHeader)
 
-
 # --- Writing --- #
 
 # Create some test data. We arbitrarily define origin and pixel size.
diff --git a/odl/contrib/mrc/mrc.py b/odl/contrib/mrc/mrc.py
index f7794c3b463..917ce4dfd83 100644
--- a/odl/contrib/mrc/mrc.py
+++ b/odl/contrib/mrc/mrc.py
@@ -8,19 +8,20 @@
 
 """Specification and reader for the MRC2014 file format."""
 
-from __future__ import print_function, division, absolute_import
+from __future__ import absolute_import, division, print_function
+
+import struct
+import warnings
 from builtins import int, object
 from collections import OrderedDict
 from itertools import permutations
+
 import numpy as np
-import struct
-import warnings
 
 from odl.contrib.mrc.uncompr_bin import (
     FileReaderRawBinaryWithHeader, FileWriterRawBinaryWithHeader,
     header_fields_from_table)
 
-
 __all__ = ('FileReaderMRC', 'FileWriterMRC', 'mrc_header_from_params')
 
 
diff --git a/odl/contrib/mrc/test/mrc_test.py b/odl/contrib/mrc/test/mrc_test.py
index 5a39323d839..02015821e89 100644
--- a/odl/contrib/mrc/test/mrc_test.py
+++ b/odl/contrib/mrc/test/mrc_test.py
@@ -9,17 +9,18 @@
 """Tests for the MRC I/O routines."""
 
 from __future__ import division
+
+import tempfile
 from itertools import permutations
-import pytest
+
 import numpy as np
-import tempfile
+import pytest
 
 import odl
 from odl.contrib.mrc import (
-    mrc_header_from_params, FileWriterMRC, FileReaderMRC)
+    FileReaderMRC, FileWriterMRC, mrc_header_from_params)
 from odl.util.testutils import all_equal, simple_fixture
 
-
 # --- pytest fixtures --- #
 
 
diff --git a/odl/contrib/mrc/test/uncompr_bin_test.py b/odl/contrib/mrc/test/uncompr_bin_test.py
index 941f5189a9d..7e9adf88ca0 100644
--- a/odl/contrib/mrc/test/uncompr_bin_test.py
+++ b/odl/contrib/mrc/test/uncompr_bin_test.py
@@ -13,15 +13,16 @@
 """
 
 from __future__ import division
-import numpy as np
+
 import tempfile
 
+import numpy as np
+
 import odl
 from odl.contrib.mrc import (
-    FileWriterRawBinaryWithHeader, FileReaderRawBinaryWithHeader)
+    FileReaderRawBinaryWithHeader, FileWriterRawBinaryWithHeader)
 from odl.util.testutils import simple_fixture
 
-
 # --- pytest fixtures --- #
 
 
diff --git a/odl/contrib/mrc/uncompr_bin.py b/odl/contrib/mrc/uncompr_bin.py
index 667b63a8fee..368682051a8 100644
--- a/odl/contrib/mrc/uncompr_bin.py
+++ b/odl/contrib/mrc/uncompr_bin.py
@@ -8,13 +8,14 @@
 
 """Utilities and class for reading uncompressed binary files with header."""
 
-from __future__ import print_function, division, absolute_import
-from builtins import int, object
-from collections import OrderedDict
+from __future__ import absolute_import, division, print_function
+
 import csv
-import numpy as np
 import struct
+from builtins import int, object
+from collections import OrderedDict
 
+import numpy as np
 
 __all__ = ('FileReaderRawBinaryWithHeader',
            'FileWriterRawBinaryWithHeader',
diff --git a/odl/contrib/pyshearlab/pyshearlab_operator.py b/odl/contrib/pyshearlab/pyshearlab_operator.py
index 635c857f7c8..4af98abb980 100644
--- a/odl/contrib/pyshearlab/pyshearlab_operator.py
+++ b/odl/contrib/pyshearlab/pyshearlab_operator.py
@@ -9,11 +9,12 @@
 """ODL integration with pyshearlab."""
 
 
-import odl
-import numpy as np
-import pyshearlab
 from threading import Lock
 
+import numpy as np
+
+import odl
+import pyshearlab
 
 __all__ = ('PyShearlabOperator',)
 
diff --git a/odl/contrib/pyshearlab/test/operator_test.py b/odl/contrib/pyshearlab/test/operator_test.py
index 8824f2d5b15..81cbe0ec0dc 100644
--- a/odl/contrib/pyshearlab/test/operator_test.py
+++ b/odl/contrib/pyshearlab/test/operator_test.py
@@ -8,13 +8,13 @@
 
 """Unit tests for the ODL-pyshearlab integration."""
 
-import pytest
 import numpy as np
+import pytest
+
 import odl
 import odl.contrib.pyshearlab
 from odl.util.testutils import all_almost_equal, simple_fixture
 
-
 dtype = simple_fixture('dtype', ['float32', 'float64'])
 shape = simple_fixture('shape', [(64, 64), (128, 128)])
 
diff --git a/odl/contrib/solvers/examples/tomography_nonlocalmeans.py b/odl/contrib/solvers/examples/tomography_nonlocalmeans.py
index 2d29ed5bbd6..c317c34def4 100644
--- a/odl/contrib/solvers/examples/tomography_nonlocalmeans.py
+++ b/odl/contrib/solvers/examples/tomography_nonlocalmeans.py
@@ -12,10 +12,10 @@
 """
 
 import numpy as np
+
 import odl
 import odl.contrib.solvers
 
-
 # Select what type of denoising to use. Options: 'TV', 'NLM' and 'TV_NLM'
 model = 'TV'
 
diff --git a/odl/contrib/solvers/functional/nonlocalmeans_functionals.py b/odl/contrib/solvers/functional/nonlocalmeans_functionals.py
index 8eded3076e9..76c8f4f4f2a 100644
--- a/odl/contrib/solvers/functional/nonlocalmeans_functionals.py
+++ b/odl/contrib/solvers/functional/nonlocalmeans_functionals.py
@@ -8,7 +8,8 @@
 
 """Non Local Means functionals."""
 
-from __future__ import print_function, division, absolute_import
+from __future__ import absolute_import, division, print_function
+
 import numpy as np
 
 from odl.operator import Operator
diff --git a/odl/contrib/tensorflow/examples/tensorflow_layer_matrix.py b/odl/contrib/tensorflow/examples/tensorflow_layer_matrix.py
index a1dfb893a34..28118827709 100644
--- a/odl/contrib/tensorflow/examples/tensorflow_layer_matrix.py
+++ b/odl/contrib/tensorflow/examples/tensorflow_layer_matrix.py
@@ -9,11 +9,12 @@
 """
 
 from __future__ import print_function
-import tensorflow as tf
+
 import numpy as np
 
 import odl
 import odl.contrib.tensorflow
+import tensorflow as tf
 
 sess = tf.InteractiveSession()
 
diff --git a/odl/contrib/tensorflow/examples/tensorflow_layer_productspace.py b/odl/contrib/tensorflow/examples/tensorflow_layer_productspace.py
index 38e035e8d8d..7172007de95 100644
--- a/odl/contrib/tensorflow/examples/tensorflow_layer_productspace.py
+++ b/odl/contrib/tensorflow/examples/tensorflow_layer_productspace.py
@@ -5,9 +5,10 @@
 """
 
 from __future__ import print_function
-import tensorflow as tf
+
 import odl
 import odl.contrib.tensorflow
+import tensorflow as tf
 
 sess = tf.InteractiveSession()
 
diff --git a/odl/contrib/tensorflow/examples/tensorflow_layer_ray_transform.py b/odl/contrib/tensorflow/examples/tensorflow_layer_ray_transform.py
index e975b961ac4..1aee0bd6077 100644
--- a/odl/contrib/tensorflow/examples/tensorflow_layer_ray_transform.py
+++ b/odl/contrib/tensorflow/examples/tensorflow_layer_ray_transform.py
@@ -5,10 +5,12 @@
 """
 
 from __future__ import print_function
-import tensorflow as tf
+
 import numpy as np
+
 import odl
 import odl.contrib.tensorflow
+import tensorflow as tf
 
 sess = tf.InteractiveSession()
 
diff --git a/odl/contrib/tensorflow/examples/tensorflow_operator_matrix.py b/odl/contrib/tensorflow/examples/tensorflow_operator_matrix.py
index f99ebbfa17d..447cb23f966 100644
--- a/odl/contrib/tensorflow/examples/tensorflow_operator_matrix.py
+++ b/odl/contrib/tensorflow/examples/tensorflow_operator_matrix.py
@@ -5,10 +5,12 @@
 """
 
 from __future__ import print_function
-import tensorflow as tf
+
 import numpy as np
+
 import odl
 import odl.contrib.tensorflow
+import tensorflow as tf
 
 sess = tf.InteractiveSession()
 
diff --git a/odl/contrib/tensorflow/examples/tensorflow_tomography.py b/odl/contrib/tensorflow/examples/tensorflow_tomography.py
index b639888b67a..f0a19c16956 100644
--- a/odl/contrib/tensorflow/examples/tensorflow_tomography.py
+++ b/odl/contrib/tensorflow/examples/tensorflow_tomography.py
@@ -7,10 +7,11 @@
 using a gradient descent method (ADAM).
 """
 
-import tensorflow as tf
 import numpy as np
+
 import odl
 import odl.contrib.tensorflow
+import tensorflow as tf
 
 sess = tf.InteractiveSession()
 
diff --git a/odl/contrib/tensorflow/layer.py b/odl/contrib/tensorflow/layer.py
index 34a14522349..89c18e3782b 100644
--- a/odl/contrib/tensorflow/layer.py
+++ b/odl/contrib/tensorflow/layer.py
@@ -8,14 +8,16 @@
 
 """Utilities for converting ODL operators to tensorflow layers."""
 
-from __future__ import print_function, division, absolute_import
+from __future__ import absolute_import, division, print_function
+
+import uuid
+
 import numpy as np
+
 import odl
-import uuid
 import tensorflow as tf
 from tensorflow.python.framework import ops
 
-
 __all__ = ('as_tensorflow_layer',)
 
 
diff --git a/odl/contrib/tensorflow/operator.py b/odl/contrib/tensorflow/operator.py
index 15ca3f567f7..fdde578f53d 100644
--- a/odl/contrib/tensorflow/operator.py
+++ b/odl/contrib/tensorflow/operator.py
@@ -8,12 +8,12 @@
 
 """Utilities for converting ODL spaces to tensorflow layers."""
 
-from __future__ import print_function, division, absolute_import
-import tensorflow as tf
+from __future__ import absolute_import, division, print_function
+
 import numpy as np
 
 import odl
-
+import tensorflow as tf
 
 __all__ = ('TensorflowOperator',)
 
diff --git a/odl/contrib/tensorflow/space.py b/odl/contrib/tensorflow/space.py
index ff152fadf04..3a5c88a9d9d 100644
--- a/odl/contrib/tensorflow/space.py
+++ b/odl/contrib/tensorflow/space.py
@@ -8,13 +8,12 @@
 
 """Utilities for converting ODL spaces to tensorflow layers."""
 
-from __future__ import print_function, division, absolute_import
-import tensorflow as tf
+from __future__ import absolute_import, division, print_function
 
+import tensorflow as tf
+from odl.operator import Operator
 from odl.set import LinearSpace, RealNumbers
 from odl.set.space import LinearSpaceElement
-from odl.operator import Operator
-
 
 __all__ = ('TensorflowSpace', 'TensorflowSpaceOperator')
 
diff --git a/odl/contrib/tensorflow/test/tensorflow_test.py b/odl/contrib/tensorflow/test/tensorflow_test.py
index 5a1d839ec23..bc03c928c31 100644
--- a/odl/contrib/tensorflow/test/tensorflow_test.py
+++ b/odl/contrib/tensorflow/test/tensorflow_test.py
@@ -9,13 +9,15 @@
 """Tests for tensorflow."""
 
 from __future__ import division
+
 from itertools import permutations
-import pytest
+
 import numpy as np
-import tensorflow as tf
+import pytest
 
 import odl
 import odl.contrib.tensorflow
+import tensorflow as tf
 from odl.util import all_almost_equal
 
 
diff --git a/odl/contrib/theano/examples/theano_layer_matrix.py b/odl/contrib/theano/examples/theano_layer_matrix.py
index e89f0c26bce..4e6002e1275 100644
--- a/odl/contrib/theano/examples/theano_layer_matrix.py
+++ b/odl/contrib/theano/examples/theano_layer_matrix.py
@@ -9,11 +9,13 @@
 """
 
 from __future__ import print_function
-import theano
-import theano.tensor as T
+
 import numpy as np
+
 import odl
 import odl.contrib.theano
+import theano
+import theano.tensor as T
 
 # --- Wrap ODL operator as Theano operator --- #
 
diff --git a/odl/contrib/theano/layer.py b/odl/contrib/theano/layer.py
index 127ec06d909..21eed112363 100644
--- a/odl/contrib/theano/layer.py
+++ b/odl/contrib/theano/layer.py
@@ -8,15 +8,14 @@
 
 """Utilities for converting ODL operators to Theano operators."""
 
-from __future__ import print_function, division, absolute_import
-from future.utils import native
+from __future__ import absolute_import, division, print_function
 
-import theano
 import numpy as np
+from future.utils import native
 
+import theano
 from odl.solvers import Functional
 
-
 __all__ = ('TheanoOperator',)
 
 
diff --git a/odl/contrib/theano/test/theano_test.py b/odl/contrib/theano/test/theano_test.py
index 3eeb73b7ac1..93ccc7b2f99 100644
--- a/odl/contrib/theano/test/theano_test.py
+++ b/odl/contrib/theano/test/theano_test.py
@@ -9,13 +9,14 @@
 """Tests for Theano."""
 
 from __future__ import division
-import pytest
+
 import numpy as np
-import theano
-import theano.tensor as T
+import pytest
 
 import odl
 import odl.contrib.theano
+import theano
+import theano.tensor as T
 from odl.util import all_almost_equal
 
 
diff --git a/odl/contrib/tomo/elekta.py b/odl/contrib/tomo/elekta.py
index 587143f25a3..9736c00d7c0 100644
--- a/odl/contrib/tomo/elekta.py
+++ b/odl/contrib/tomo/elekta.py
@@ -9,8 +9,8 @@
 """Tomography helpers for Elekta systems."""
 
 import numpy as np
-import odl
 
+import odl
 
 __all__ = ('elekta_icon_geometry',
            'elekta_icon_space',
diff --git a/odl/contrib/tomo/examples/elekta_icon_algebraic_reconstruction.py b/odl/contrib/tomo/examples/elekta_icon_algebraic_reconstruction.py
index af9eba9fd14..4a666667e9a 100644
--- a/odl/contrib/tomo/examples/elekta_icon_algebraic_reconstruction.py
+++ b/odl/contrib/tomo/examples/elekta_icon_algebraic_reconstruction.py
@@ -5,6 +5,7 @@
 """
 
 import numpy as np
+
 import odl
 from odl.contrib import tomo
 
diff --git a/odl/contrib/tomo/examples/elekta_xvi_algebraic_reconstruction.py b/odl/contrib/tomo/examples/elekta_xvi_algebraic_reconstruction.py
index 2610953e6c2..334e0a02145 100644
--- a/odl/contrib/tomo/examples/elekta_xvi_algebraic_reconstruction.py
+++ b/odl/contrib/tomo/examples/elekta_xvi_algebraic_reconstruction.py
@@ -5,6 +5,7 @@
 """
 
 import numpy as np
+
 import odl
 from odl.contrib import tomo
 
diff --git a/odl/contrib/torch/examples/operator_autograd.py b/odl/contrib/torch/examples/operator_autograd.py
index 255c0f46f91..d30a7079ccb 100644
--- a/odl/contrib/torch/examples/operator_autograd.py
+++ b/odl/contrib/torch/examples/operator_autograd.py
@@ -11,9 +11,11 @@
 """
 
 from __future__ import print_function
+
 import numpy as np
-import torch
+
 import odl
+import torch
 from odl.contrib import torch as odl_torch
 
 # --- Forward --- #
diff --git a/odl/contrib/torch/examples/operator_module.py b/odl/contrib/torch/examples/operator_module.py
index 769b85ef307..b4322d8a43f 100644
--- a/odl/contrib/torch/examples/operator_module.py
+++ b/odl/contrib/torch/examples/operator_module.py
@@ -11,11 +11,11 @@
 """
 
 import numpy as np
+
 import odl
 import torch
-from torch import autograd, nn
 from odl.contrib import torch as odl_torch
-
+from torch import autograd, nn
 
 # --- Forward --- #
 
diff --git a/odl/contrib/torch/operator.py b/odl/contrib/torch/operator.py
index b7ed3034713..5837c36a215 100644
--- a/odl/contrib/torch/operator.py
+++ b/odl/contrib/torch/operator.py
@@ -14,7 +14,9 @@
 """
 
 from __future__ import division
+
 import numpy as np
+
 import torch
 
 __all__ = ('OperatorAsAutogradFunction', 'OperatorAsModule')
diff --git a/odl/contrib/torch/test/test_operator.py b/odl/contrib/torch/test/test_operator.py
index b8a70e73a89..6903bb48af0 100644
--- a/odl/contrib/torch/test/test_operator.py
+++ b/odl/contrib/torch/test/test_operator.py
@@ -9,13 +9,12 @@
 """Unit tests for the ODL-pytorch integration."""
 
 import numpy as np
-import torch
-from torch import autograd, nn
 
 import odl
+import torch
 from odl.contrib import torch as odl_torch
 from odl.util.testutils import all_almost_equal, simple_fixture
-
+from torch import autograd, nn
 
 dtype = simple_fixture('dtype', ['float32', 'float64'])
 use_cuda_params = [False]