MRG: removing some vendored dependencies

.travis.yml

@@ -20,7 +20,7 @@ addons:
       - libatlas-base-dev
 env:
     global:
-        - DEPENDS="numpy scipy matplotlib h5py pillow"
+        - DEPENDS="six numpy scipy matplotlib h5py pillow"
         - PYDICOM=1
         - INSTALL_TYPE="setup"
         - EXTRA_WHEELS="https://5cf40426d9f06eb7461d-6fe47d9331aba7cd62fc36c7196769e4.ssl.cf2.rackcdn.com"
@@ -37,7 +37,7 @@ matrix:
     # Absolute minimum dependencies
     - python: 2.7
       env:
-        - DEPENDS=numpy==1.6.0 PYDICOM=0
+        - DEPENDS="numpy==1.6.0" PYDICOM=0
     # Absolute minimum dependencies plus oldest MPL
     # Check these against:
     # nibabel/info.py

bin/nib-ls

@@ -19,11 +19,9 @@ import numpy as np
 import nibabel as nib
 
 from math import ceil
-from collections import defaultdict
 from optparse import OptionParser, Option
 from io import StringIO
 from nibabel.py3k import asunicode
-from nibabel.externals.six.moves import xrange
 
 __author__ = 'Yaroslav Halchenko'
 __copyright__ = 'Copyright (c) 2011-2016 Yaroslav Halchenko ' \

doc/source/installation.rst

@@ -88,6 +88,7 @@ Requirements
 
 *  Python_ 2.7, or >= 3.4
 *  NumPy_ 1.6 or greater
+*  Six_ 1.3 or greater
 *  SciPy_ (optional, for full SPM-ANALYZE support)
 *  PyDICOM_ 0.9.7 or greater (optional, for DICOM support)
 *  `Python Imaging Library`_ (optional, for PNG conversion in DICOMFS)

nibabel/affines.py

@@ -5,7 +5,7 @@
 
 import numpy as np
 
-from .externals.six.moves import reduce
+from six.moves import reduce
 
 
 class AffineError(ValueError):

nibabel/benchmarks/bench_load_save.py

@@ -19,7 +19,7 @@
 
 import numpy as np
 
-from ..externals.six import BytesIO
+from io import BytesIO
 
 from .. import Nifti1Image
 

nibabel/benchmarks/bench_streamlines.py

@@ -17,7 +17,7 @@
 
 import numpy as np
 
-from nibabel.externals.six.moves import zip
+from six.moves import zip
 from nibabel.tmpdirs import InTemporaryDirectory
 
 from numpy.testing import assert_array_equal

nibabel/data.py

@@ -8,7 +8,7 @@
 from os.path import join as pjoin
 import glob
 import sys
-from .externals.six.moves import configparser
+from six.moves import configparser
 from distutils.version import LooseVersion
 
 from .environment import get_nipy_user_dir, get_nipy_system_dir

nibabel/dft.py

@@ -22,7 +22,7 @@
 
 import numpy
 
-from .externals.six import BytesIO
+from six import BytesIO
 
 from .nifti1 import Nifti1Header
 

nibabel/eulerangles.py

@@ -85,7 +85,7 @@
 
 import math
 
-from .externals.six.moves import reduce
+from six.moves import reduce
 
 import numpy as np
 

nibabel/externals/__init__.py

@@ -1,5 +1,5 @@
 # init for externals package
-try:
-    from collections import OrderedDict
-except ImportError:  # < Python 2.7
-    from .ordereddict import OrderedDict
+from collections import OrderedDict
+
+from ..deprecated import ModuleProxy as _ModuleProxy
+six = _ModuleProxy('nibabel.externals.six')

nibabel/externals/netcdf.py

@@ -35,13 +35,13 @@
 from operator import mul
 from mmap import mmap, ACCESS_READ
 
-import numpy as np
+import numpy as np  # noqa
 from ..py3k import asbytes, asstr
 from numpy import fromstring, ndarray, dtype, empty, array, asarray
 from numpy import little_endian as LITTLE_ENDIAN
 from functools import reduce
 
-from .six import integer_types
+from six import integer_types
 
 
 ABSENT = b'\x00\x00\x00\x00\x00\x00\x00\x00'