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 SimpleITK as sitk
  import sys
  
  # this test is suppose to test the python interface to the IO classes
  
  if len ( sys.argv ) != 2:
      print( "Usage: %s outputPath" % ( sys.argv[0] ) )
  
  outputPath = sys.argv[1]
  
  image = sitk.Image( 10, 10, sitk.sitkInt32 )
  
  
  try:
      sitk.WriteImage( image, "this.isafilenamewithnoimageio" )
  except RuntimeError as e:
      print( "Caught expected error" )
  
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 SimpleITK as sitk
  import sys
  
  # this test is suppose to test the python interface to the IO classes
  
  if __name__ == '__main__':
  
      if len ( sys.argv ) != 2:
          print( "Usage: %s outputPath" % ( sys.argv[0] ) )
  
      outputPath = sys.argv[1]
  
      image = sitk.Image( 10, 10, sitk.sitkInt32 )
  
  
      try:
          sitk.WriteImage( image, "this.isafilenamewithnoimageio" )
      except RuntimeError as e:
          print( "Caught expected error" )
  
subject: Update IOTest.py to detect main execution