text: #
  # This file contains the Python code from Program 5.11 of
  # "Data Structures and Algorithms
  # with Object-Oriented Design Patterns in Python"
  # by Bruno R. Preiss.
  #
  # Copyright (c) 2003 by Bruno R. Preiss, P.Eng.  All rights reserved.
  #
  # http://www.brpreiss.com/books/opus7/programs/pgm05_11.txt
  #
  class Association(Object):
  
      def getKey(self):
          return self._tuple[0]
  
      key = property(
          fget = lambda self: self.getKey())
  
      def getValue(self):
          return self._tuple[1]
  
      value = property(
          fget = lambda self: self.getValue())
  
      # ...
  