FIX: Update the import statements to use absolute import in core

dipy/core/gradients.py

@@ -1,6 +1,6 @@
 from __future__ import division, print_function, absolute_import
 
-from ..utils.six import string_types
+from dipy.utils.six import string_types
 
 import numpy as np
 try:
@@ -9,9 +9,9 @@
     from dipy.fixes.scipy import polar
 from scipy.linalg import inv
 
-from ..io import gradients as io
-from .onetime import auto_attr
-from .geometry import vector_norm
+from dipy.io import gradients as io
+from dipy.core.onetime import auto_attr
+from dipy.core.geometry import vector_norm
 
 
 class GradientTable(object):

dipy/core/profile.py

@@ -4,7 +4,7 @@
 import os
 import subprocess
 
-from ..utils.optpkg import optional_package
+from dipy.utils.optpkg import optional_package
 
 cProfile, _, _ = optional_package('cProfile')
 pstats, _, _ = optional_package('pstats',

dipy/core/sphere.py

@@ -3,7 +3,7 @@
 import numpy as np
 import warnings
 
-from ..utils.six.moves import xrange
+from dipy.utils.six.moves import xrange
 
 from dipy.core.geometry import cart2sphere, sphere2cart, vector_norm
 from dipy.core.onetime import auto_attr

dipy/core/subdivide_octahedron.py

@@ -10,7 +10,7 @@
 produced by 2d (lon-lat) parameterization methods.
 
 """
-from .sphere import unit_octahedron, HemiSphere
+from dipy.core.sphere import unit_octahedron, HemiSphere
 
 def create_unit_sphere( recursion_level=2 ):
     """ Creates a unit sphere by subdividing a unit octahedron.

dipy/core/tests/test_sphere.py

@@ -4,7 +4,7 @@
 import numpy.testing as nt
 import warnings
 
-from ...utils.six.moves import xrange
+from dipy.utils.six.moves import xrange
 
 from dipy.core.sphere import (Sphere, HemiSphere, unique_edges, unique_sets,
                               faces_from_sphere_vertices, HemiSphere,