"""Pluralize English nouns (stage 4)
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 plural4.py noun
nouns
"""
__author__ = "Mark Pilgrim (mark@diveintopython.org)"
__version__ = "$Revision: 1.3 $"
__date__ = "$Date: 2004/03/18 16:43:37 $"
__copyright__ = "Copyright (c) 2004 Mark Pilgrim"
__license__ = "Python"
import re
def buildMatchAndApplyFunctions((pattern, search, replace)):
matchFunction = lambda word: re.search(pattern, word)
applyFunction = lambda word: re.sub(search, replace, word)
return (matchFunction, applyFunction)
patterns = \
(
('[sxz]$', '$', 'es'),
('[^aeioudgkprt]h$', '$', 'es'),
('(qu|[^aeiou])y$', 'y$', 'ies'),
('$', '$', 's')
)
rules = map(buildMatchAndApplyFunctions, patterns)
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__
