Fix python 2.6 restoration/unwrap error

.travis.yml

@@ -90,18 +90,13 @@ script:
 
     # Run all doc examples
     - export PYTHONPATH=$(pwd):$PYTHONPATH
-    - if [[ $ENV != python=2.6* ]]; then
-          for f in doc/examples/*.py; do python "$f"; if [ $? -ne 0 ]; then exit 1; fi done
-      fi
+    - for f in doc/examples/*.py; do python "$f"; if [ $? -ne 0 ]; then exit 1; fi done
     - for f in doc/examples/applications/*.py; do python "$f"; if [ $? -ne 0 ]; then exit 1; fi done
 
     # run tests again with optional dependencies to get more coverage
     # measure coverage on py3.3
-    # doctests fail on python 2.6 for restoration/unwrap
     - if [[ $ENV == python=3.3* ]]; then
          nosetests --exe -v --with-doctest --with-cov --cover-package skimage;
-      elif [[ $ENV == python=2.6* ]]; then
-         nosetests --exe -v skimage;
       else
          nosetests --exe -v --with-doctest skimage;
       fi

skimage/restoration/tests/test_unwrap.py

@@ -7,7 +7,6 @@ from numpy.testing import (run_module_suite, assert_array_almost_equal,
 import warnings
 
 from skimage.restoration import unwrap_phase
-from skimage.util.version_requirements import require
 
 
 def assert_phase_almost_equal(a, b, *args, **kwargs):
@@ -42,7 +41,6 @@ def check_unwrap(image, mask=None):
     assert_phase_almost_equal(image_unwrapped, image)
 
 
-@require('python', '>=2.7')
 def test_unwrap_1d():
     image = np.linspace(0, 10 * np.pi, 100)
     check_unwrap(image)
@@ -52,7 +50,6 @@ def test_unwrap_1d():
     assert_raises(ValueError, unwrap_phase, image, True)
 
 
-@require('python', '>=2.7')
 def test_unwrap_2d():
     x, y = np.ogrid[:8, :16]
     image = 2 * np.pi * (x * 0.2 + y * 0.1)
@@ -62,7 +59,6 @@ def test_unwrap_2d():
     yield check_unwrap, image, mask
 
 
-@require('python', '>=2.7')
 def test_unwrap_3d():
     x, y, z = np.ogrid[:8, :12, :16]
     image = 2 * np.pi * (x * 0.2 + y * 0.1 + z * 0.05)
@@ -108,14 +104,12 @@ def check_wrap_around(ndim, axis):
                         image_unwrap_wrap_around[index_last])
 
 
-@require('python', '>=2.7')
 def test_wrap_around():
     for ndim in (2, 3):
         for axis in range(ndim):
             yield check_wrap_around, ndim, axis
 
 
-@require('python', '>=2.7')
 def test_mask():
     length = 100
     ramps = [np.linspace(0, 4 * np.pi, length),
@@ -143,7 +137,6 @@ def test_mask():
         assert_array_almost_equal(image_unwrapped_3d[:, :, -1], image[i, -1])
 
 
-@require('python', '>=2.7')
 def test_invalid_input():
     assert_raises(ValueError, unwrap_phase, np.zeros([]))
     assert_raises(ValueError, unwrap_phase, np.zeros((1, 1, 1, 1)))

skimage/restoration/unwrap.py

@@ -1,14 +1,12 @@
 import numpy as np
 import warnings
 from six import string_types
-from skimage.util.version_requirements import require
 
 from ._unwrap_1d import unwrap_1d
 from ._unwrap_2d import unwrap_2d
 from ._unwrap_3d import unwrap_3d
 
 
-@require('python', '>=2.7')
 def unwrap_phase(image, wrap_around=False):
     '''From ``image``, wrapped to lie in the interval [-pi, pi), recover the
     original, unwrapped image.
@@ -86,6 +84,7 @@ def unwrap_phase(image, wrap_around=False):
 
     if np.ma.isMaskedArray(image):
         mask = np.require(image.mask, np.uint8, ['C'])
+        image = image.data
     else:
         mask = np.zeros_like(image, dtype=np.uint8, order='C')
     image_not_masked = np.asarray(image, dtype=np.float64, order='C')