"""Pluralize English nouns (stage 2)
This program is part of "Dive Into Python", a free Python book for
experienced programmers. Visit http://diveintopython.org/ for the
latest version.
Command line usage:
$ python plural2.py noun
nouns
"""
__author__ = "Mark Pilgrim (mark@diveintopython.org)"
__version__ = "$Revision: 1.4 $"
__date__ = "$Date: 2004/03/18 18:55:45 $"
__copyright__ = "Copyright (c) 2004 Mark Pilgrim"
__license__ = "Python"
import re
def match_sxz(noun):
return re.search('[sxz]$', 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 1
def 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__
