def get_renderer(renderer_name, package=None):
 if (package is None):
  package = caller_package()
 helper = RendererHelper(name=renderer_name, package=package)
 return helper.renderer

def get_renderer ( renderer_name , package = None ) : if ( package is None ) : package = caller_package ( ) helper = RendererHelper ( name = renderer_name , package = package ) return helper . renderer
return the appropriate helprenderer implementation for the current platform .