how can I arrange attribute in assending order like: 5,6,3 = 3,5,6

how can I arrange attribute in assending order like: 5,6,3 = 3,5,6

also i have check FME python caller but its not work.output is not generating.

import fme

import fmeobjects

class FeatureProcessor(object):

  def __init__(self):

    """Base constructor for class members."""

    pass

  def input(self, feature):

    cell_value = feature.getAttribute('Address Component Type')

    cell_value2=sorted(cell_value)

    feature.setAttribute('sorted',cell_value2)

    self.pyoutput(feature)

  def close(self):

    """This method is called once all the FME Features have been processed

    from input().

    """

    pass