text: import vtk
  
  
  def main():
      colors = vtk.vtkNamedColors()
  
      textSource = vtk.vtkVectorText()
      textSource.SetText('Hello')
      textSource.Update()
  
      # Create a mapper and actor
      mapper = vtk.vtkPolyDataMapper()
      mapper.SetInputConnection(textSource.GetOutputPort())
  
      actor = vtk.vtkActor()
      actor.SetMapper(mapper)
      actor.GetProperty().SetColor(colors.GetColor3d('DarkSlateGray'))
  
      # Create a renderer, render window, and interactor
      renderer = vtk.vtkRenderer()
      renderWindow = vtk.vtkRenderWindow()
      renderWindow.AddRenderer(renderer)
      renderWindow.SetWindowName('VectorText')
  
      renderWindowInteractor = vtk.vtkRenderWindowInteractor()
      renderWindowInteractor.SetRenderWindow(renderWindow)
  
      # Add the actor to the scene
      renderer.AddActor(actor)
      renderer.SetBackground(colors.GetColor3d('Bisque'))
  
      # Render and interact
      renderWindow.Render()
      renderWindowInteractor.Start()
  
  
  if __name__ == '__main__':
      main()
  