"""Pluralize English nouns (stage 2)This program is part of "Dive Into Python", a free Python book forexperienced programmers.  Visit http://diveintopython.org/ for thelatest version.Command line usage:$ python plural2.py nounnouns"""__author__ = "Mark Pilgrim (mark@diveintopython.org)"__version__ = "$Revision: 1.4 $"__date__ = "$Date: 2004/03/18 18:55:45 $"__copyright__ = "Copyright (c) 2004 Mark Pilgrim"__license__ = "Python"import redef match_sxz(noun):    return re.search('[sxz]$', noun)def apply_sxz(noun):    return re.sub('$', 'es', noun)def match_h(noun):    return re.search('[^aeioudgkprt]h$', noun)def apply_h(noun):    return re.sub('$', 'es', noun)def match_y(noun):    return re.search('[^aeiou]y$', noun)        def apply_y(noun):    return re.sub('y$', 'ies', noun)def match_default(moun):    return 1def apply_default(noun):    return noun + 's'rules = ((match_sxz, apply_sxz),         (match_h, apply_h),         (match_y, apply_y),         (match_default, apply_default)         )def plural(noun):    for matchesRule, applyRule in rules:        if matchesRule(noun):            return applyRule(noun)if __name__ == '__main__':    import sys    if sys.argv[1:]:        print plural(sys.argv[1])    else:        print __doc__