old_contents: import os
  import numpy as np
  
  from nibabel.tmpdirs import InTemporaryDirectory
  
  from ..dpy import Dpy, have_tables
  
  
  from nose.tools import assert_true, assert_false, \
       assert_equal, assert_raises
  
  from numpy.testing import assert_array_equal, assert_array_almost_equal
  import numpy.testing as npt
  
  # Decorator to protect tests from being run without pytables present
  iftables = npt.dec.skipif(not have_tables,
                            'Pytables does not appear to be installed')
  
  
  @iftables
  def test_dpy():
      fname = 'test.bin'
      with InTemporaryDirectory():
          dpw = Dpy(fname, 'w')
          A = np.ones((5, 3))
          B = 2 * A.copy()
          C = 3 * A.copy()
          dpw.write_track(A)
          dpw.write_track(B)
          dpw.write_track(C)
          dpw.write_tracks([C, B, A])
          dpw.close()
          dpr = Dpy(fname, 'r')
          assert_equal(dpr.version() == '0.0.1', True)
          T = dpr.read_tracksi([0, 1, 2, 0, 0, 2])
          T2 = dpr.read_tracks()
          assert_equal(len(T2), 6)
          dpr.close()
          assert_array_equal(A, T[0])
          assert_array_equal(C, T[5])
  
new_contents: import os
  import numpy as np
  
  from nibabel.tmpdirs import InTemporaryDirectory
  
  from dipy.io.dpy import Dpy, have_tables
  
  
  from nose.tools import assert_true, assert_false, \
       assert_equal, assert_raises
  
  from numpy.testing import assert_array_equal, assert_array_almost_equal
  import numpy.testing as npt
  
  # Decorator to protect tests from being run without pytables present
  iftables = npt.dec.skipif(not have_tables,
                            'Pytables does not appear to be installed')
  
  
  @iftables
  def test_dpy():
      fname = 'test.bin'
      with InTemporaryDirectory():
          dpw = Dpy(fname, 'w')
          A = np.ones((5, 3))
          B = 2 * A.copy()
          C = 3 * A.copy()
          dpw.write_track(A)
          dpw.write_track(B)
          dpw.write_track(C)
          dpw.write_tracks([C, B, A])
          dpw.close()
          dpr = Dpy(fname, 'r')
          assert_equal(dpr.version() == '0.0.1', True)
          T = dpr.read_tracksi([0, 1, 2, 0, 0, 2])
          T2 = dpr.read_tracks()
          assert_equal(len(T2), 6)
          dpr.close()
          assert_array_equal(A, T[0])
          assert_array_equal(C, T[5])
  
subject: Use absolute import in test_dpy