code: def decimation_algorithm(inp, target_reduction):
      """
      Decimate the input data to the target reduction.
  
      Parameters
      ----------
      inp : vtk.vtkDataObject
          The input data to be decimated.
      target_reduction : float
          The target reduction amount, as a fraction of the original data.
  
      Returns
      -------
      vtk.vtkQuadricDecimation
          The decimation algorithm that has been applied to the input data.
      """
      alg = _vtk.vtkQuadricDecimation()
      alg.SetTargetReduction(target_reduction)
      set_algorithm_input(alg, inp)
      return alg
  
imports: import traceback
  import numpy
  import pyvista
  from pyvista.core.errors import PyVistaPipelineError
  from pyvista.core.utilities.helpers import wrap
  from pyvista.plotting import _vtk
label_desc: Use image node_id 12 for calling a global function with example usage: decimation_algorithm(inp, target_reduction) and returns: alg