'''Pluralize English nouns (stage 2)
Command line usage:
$ python plural2.py noun
nouns
'''
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(noun):
return True
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 matches_rule, apply_rule in rules:
if matches_rule(noun):
return apply_rule(noun)
if __name__ == '__main__':
import sys
if sys.argv[1:]:
print(plural(sys.argv[1]))
else:
print(__doc__)
# Copyright (c) 2009, Mark Pilgrim, All rights reserved.
#
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