'''Pluralize English nouns (stage 4)
Command line usage:
$ python plural4.py noun
nouns
'''
import re
def build_match_and_apply_functions(pattern, search, replace):
def matches_rule(word):
return re.search(pattern, word)
def apply_rule(word):
return re.sub(search, replace, word)
return (matches_rule, apply_rule)
rules = []
with open('plural4-rules.txt', encoding='utf-8') as pattern_file:
for line in pattern_file:
pattern, search, replace = line.split(None, 3)
rules.append(build_match_and_apply_functions(
pattern, search, replace))
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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