text: #!/usr/bin/env python
  import vtk
  from vtk.util.misc import vtkGetDataRoot
  VTK_DATA_ROOT = vtkGetDataRoot()
  
  reader = vtk.vtkExodusIIReader()
  reader.SetFileName(VTK_DATA_ROOT + "/Data/can.ex2")
  reader.UpdateInformation()
  
  for i in range(reader.GetNumberOfObjectArrays(reader.GLOBAL)):
      name = reader.GetObjectArrayName(reader.GLOBAL, i)
      reader.SetObjectArrayStatus(reader.GLOBAL, name, 1)
  
  extractTFD = vtk.vtkExtractExodusGlobalTemporalVariables()
  extractTFD.SetInputConnection(reader.GetOutputPort())
  extractTFD.Update()
  
  data = extractTFD.GetOutputDataObject(0)
  assert data.IsA("vtkTable")
  assert data.GetNumberOfRows() == reader.GetNumberOfTimeSteps()
  assert data.GetNumberOfColumns() > 0
  