old_contents: from mayavi import mlab
  from mayavi.tools.tools import _typical_distance
  
  from simphony.cuds.abstractmesh import ABCMesh
  from simphony.cuds.abstractparticles import ABCParticles
  from simphony.cuds.abstractlattice import ABCLattice
  
  from simphony_mayavi.sources.api import (
      ParticlesSource, MeshSource, LatticeSource)
  
  
  def show(cuds):
  
      if isinstance(cuds, ABCMesh):
          source = MeshSource.from_mesh(cuds)
          mlab.pipeline.surface(source, name=cuds.name)
      elif isinstance(cuds, ABCParticles):
          source = ParticlesSource.from_particles(cuds)
          scale_factor = _typical_distance(source.data) * 0.5
          mlab.pipeline.glyph(
              source, name=cuds.name,
              scale_factor=scale_factor, scale_mode='none')
          mlab.pipeline.surface(source)
      elif isinstance(cuds, ABCLattice):
          source = LatticeSource.from_lattice(cuds)
          scale_factor = _typical_distance(source.data) * 0.5
          mlab.pipeline.glyph(
              source, name=cuds.name,
              scale_factor=scale_factor, scale_mode='none')
      else:
          msg = 'Provided object {} is not of any known cuds type'
          raise TypeError(msg.format(type(cuds)))
      mlab.show()
  
new_contents: from mayavi import mlab
  from mayavi.tools.tools import _typical_distance
  
  from simphony.cuds.abstractmesh import ABCMesh
  from simphony.cuds.abstractparticles import ABCParticles
  from simphony.cuds.abstractlattice import ABCLattice
  
  from simphony_mayavi.sources.api import (
      ParticlesSource, MeshSource, LatticeSource)
  
  
  def show(cuds):
      """ Show the cuds objects using the default visualisation.
  
       Parameters
       ----------
       cuds :
           A top level cuds object (e.g. a mesh). The method will detect
           the type of object and create the appropriate visualisation.
  
      """
      if isinstance(cuds, ABCMesh):
          source = MeshSource.from_mesh(cuds)
          mlab.pipeline.surface(source, name=cuds.name)
      elif isinstance(cuds, ABCParticles):
          source = ParticlesSource.from_particles(cuds)
          scale_factor = _typical_distance(source.data) * 0.5
          mlab.pipeline.glyph(
              source, name=cuds.name,
              scale_factor=scale_factor, scale_mode='none')
          mlab.pipeline.surface(source)
      elif isinstance(cuds, ABCLattice):
          source = LatticeSource.from_lattice(cuds)
          scale_factor = _typical_distance(source.data) * 0.5
          mlab.pipeline.glyph(
              source, name=cuds.name,
              scale_factor=scale_factor, scale_mode='none')
      else:
          msg = 'Provided object {} is not of any known cuds type'
          raise TypeError(msg.format(type(cuds)))
      mlab.show()
  
subject: add a docstring for ``show``