old_contents: #==========================================================================
  #
  #   Copyright Insight Software Consortium
  #
  #   Licensed under the Apache License, Version 2.0 (the "License");
  #   you may not use this file except in compliance with the License.
  #   You may obtain a copy of the License at
  #
  #          http://www.apache.org/licenses/LICENSE-2.0.txt
  #
  #   Unless required by applicable law or agreed to in writing, software
  #   distributed under the License is distributed on an "AS IS" BASIS,
  #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  #   See the License for the specific language governing permissions and
  #   limitations under the License.
  #
  #==========================================================================*/
  
  from __future__ import print_function
  import unittest
  
  import SimpleITK as sitk
  import sys
  
  
  class ImageTests(unittest.TestCase):
      """These tests are suppose to test the python interface to the sitk::Image"""
  
  
  
      def setUp(self):
          pass
  
      def test_legacy(self):
          """ This is old testing cruft before tehe unittest enlightenment """
  
          image = sitk.Image( 10, 10, sitk.sitkInt32 )
  
          image + image
          image + 1
          1 + image
          image - image
          image - 1
          1 - image
          image * image
          image * 1
          1 * image
          image / image
          1.0 / image
          image / 1.0
          image // image
          image // 1
          1 // image
          image & image
          image | image
          image ^ image
          ~image
  
          image += image
          image -= image
          image *= image
          image /= image
          image //= image
  
          image = image * 0
  
          image.SetPixel( 0, 0, 1 )
          image[ [0,1] ]  = 2
          image[ 9,9 ]  = 3
          image.SetPixel( [0, 2], 4 )
  
          self.assertEqual(image.GetPixel(1,1), 0 )
          self.assertEqual(image.GetPixel([0,2]), 4 )
          image[1,1]
          image[ [ 1,1 ] ]
  
          self.assertEqual(sum( image ), 10)
  
          self.assertEqual(len( image ), 100)
  
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: #==========================================================================
  #
  #   Copyright Insight Software Consortium
  #
  #   Licensed under the Apache License, Version 2.0 (the "License");
  #   you may not use this file except in compliance with the License.
  #   You may obtain a copy of the License at
  #
  #          http://www.apache.org/licenses/LICENSE-2.0.txt
  #
  #   Unless required by applicable law or agreed to in writing, software
  #   distributed under the License is distributed on an "AS IS" BASIS,
  #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  #   See the License for the specific language governing permissions and
  #   limitations under the License.
  #
  #==========================================================================*/
  
  from __future__ import print_function
  import unittest
  
  import SimpleITK as sitk
  import sys
  
  
  class ImageTests(unittest.TestCase):
      """These tests are suppose to test the python interface to the sitk::Image"""
  
  
  
      def setUp(self):
          pass
  
      def test_iterable(self):
          """Test that the Image object is iterable"""
  
           # create image filled with zeros
          image = sitk.Image( 10, 10, sitk.sitkInt32 )
  
          image[9,9] = 10;
  
          self.assertEqual(sum( image ), 10)
  
      def test_set_get_pixel(self):
          """Test methods for setting and getting pixel"""
  
          # create image filled with zeros
          image = sitk.Image( 10, 10, sitk.sitkInt32 )
  
          image.SetPixel( 0, 0, 1 )
          image[ [0,1] ]  = 2
          image[ 9,9 ]  = 3
          image.SetPixel( [0, 2], 4 )
  
          self.assertEqual(image.GetPixel(1,1), 0 )
          self.assertEqual(image.GetPixel([0,2]), 4 )
  
          self.assertEqual(image[0,1], 2)
          self.assertEqual(image[[ 9,9 ]], 3)
  
  
  
          self.assertEqual(len( image ), 100)
  
  
      def test_legacy(self):
          """ This is old testing cruft before tehe unittest enlightenment """
  
          image = sitk.Image( 10, 10, sitk.sitkInt32 )
  
          image + image
          image + 1
          1 + image
          image - image
          image - 1
          1 - image
          image * image
          image * 1
          1 * image
          image / image
          1.0 / image
          image / 1.0
          image // image
          image // 1
          1 // image
          image & image
          image | image
          image ^ image
          ~image
  
          image += image
          image -= image
          self.assertEqual(image.GetPixel(1,1), 0 )
  
          image *= image
          self.assertEqual(image.GetPixel(1,1), 0 )
  
  
          # True division will results in "nan" while
          image /= image
          image //= image
  
          image = image * 0
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Update Python Image test for division by zero