# NewSequence.py

    ############################################################################
    #
    #  Program: GDCM (Grassroots DICOM). A DICOM library
    #  Module:  $URL$
    #
    #  Copyright (c) 2006-2010 Mathieu Malaterre
    #  All rights reserved.
    #  See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
    #
    #     This software is distributed WITHOUT ANY WARRANTY; without even
    #     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    #     PURPOSE.  See the above copyright notice for more information.
    #
    ############################################################################

    """
    Usage:

      python NewSequence.py input.dcm output.dcm

    Thanks to Robert Irie for code
    """

    import sys
    import gdcm

    if __name__ == "__main__":

      file1 = sys.argv[1]
      file2 = sys.argv[2]

      r = gdcm.Reader()
      r.SetFileName( file1 )
      if not r.Read():
        sys.exit(1)

      f = r.GetFile()
      ds = f.GetDataSet()
      #tsis = gdcm.Tag(0x0008,0x2112) # SourceImageSequence

      # Create a dataelement
      de = gdcm.DataElement(gdcm.Tag(0x0010, 0x2180))
      de.SetByteValue("Occupation", gdcm.VL(len("Occupation")))
      de.SetVR(gdcm.VR(gdcm.VR.SH))

      # Create an item
      it=gdcm.Item()
      it.SetVLToUndefined()      # Needed to not popup error message
      #it.InsertDataElement(de)
      nds=it.GetNestedDataSet()
      nds.Insert(de)

      # Create a Sequence
      sq=gdcm.SequenceOfItems().New()
      sq.SetLengthToUndefined()
      sq.AddItem(it)

      # Insert sequence into data set
      des=gdcm.DataElement(gdcm.Tag(0x0400,0x0550))
      des.SetVR(gdcm.VR(gdcm.VR.SQ))
      des.SetValue(sq.__ref__())
      des.SetVLToUndefined()

      ds.Insert(des)

      w = gdcm.Writer()
      w.SetFile( f )
      w.SetFileName( file2 )
      if not w.Write():
        sys.exit(1)