text: #==========================================================================
  #
  #   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.
  #
  #==========================================================================*/
  import itk
  from sys import argv
  
  md = itk.MetaDataDictionary()
  # one way of setting and retrieving double value in the dictionary
  dv = itk.MetaDataObject.D.New()
  dv.SetMetaDataObjectValue(10.0)
  md.Set("double", dv)
  print md.Get("double")
  # other way of setting and retrieving double value (levereges on Python's weak type system)
  md['double'] = 10.0
  print md['double']
  