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Source code for galaxy.util.inflection

#!/usr/bin/env python

# Copyright (c) 2006 Bermi Ferrer Martinez
# bermi a-t bermilabs - com
# See the end of this file for the free software, open source license (BSD-style).
# Modified by the Galaxy team.

import re

[docs]class Inflector: """ Inflector for pluralizing and singularizing English nouns. """ # This is a small subset of words that either have the same singular and plural form, or have no singular form NONCHANGING_WORDS = { "equipment", "information", "rice", "money", "species", "series", "sheep", "sms", } IRREGULAR_WORDS = { "person": "people", "man": "men", "child": "children", "sex": "sexes", "move": "moves", "octopus": "octopi", } PLURALIZE_RULES = ( ("(?i)(quiz)$", "\\1zes"), ("(?i)^(ox)$", "\\1en"), ("(?i)([m|l])ouse$", "\\1ice"), ("(?i)(matr|vert|ind)ix|ex$", "\\1ices"), ("(?i)(x|ch|ss|sh)$", "\\1es"), ("(?i)([^aeiouy]|qu)ies$", "\\1y"), ("(?i)([^aeiouy]|qu)y$", "\\1ies"), ("(?i)(hive)$", "\\1s"), ("(?i)(?:([^f])fe|([lr])f)$", "\\1\\2ves"), ("(?i)sis$", "ses"), ("(?i)([ti])um$", "\\1a"), ("(?i)(buffal|tomat)o$", "\\1oes"), ("(?i)(bu)s$", "\\1ses"), ("(?i)(alias|status|virus)", "\\1es"), ("(?i)(ax|test)is$", "\\1es"), ("(?i)s$", "s"), ("(?i)$", "s"), ) SINGULARIZE_RULES = ( ("(?i)(quiz)zes$", "\\1"), ("(?i)(matr)ices$", "\\1ix"), ("(?i)(vert|ind)ices$", "\\1ex"), ("(?i)^(ox)en", "\\1"), ("(?i)(alias|status|virus)es$", "\\1"), ("(?i)(cris|ax|test)es$", "\\1is"), ("(?i)(shoe)s$", "\\1"), ("(?i)(o)es$", "\\1"), ("(?i)(bus)es$", "\\1"), ("(?i)([m|l])ice$", "\\1ouse"), ("(?i)(x|ch|ss|sh)es$", "\\1"), ("(?i)(m)ovies$", "\\1ovie"), ("(?i)(s)eries$", "\\1eries"), ("(?i)([^aeiouy]|qu)ies$", "\\1y"), ("(?i)([lr])ves$", "\\1f"), ("(?i)(tive)s$", "\\1"), ("(?i)(hive)s$", "\\1"), ("(?i)([^f])ves$", "\\1fe"), ("(?i)(^analy)ses$", "\\1sis"), ("(?i)((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$", "\\1\\2sis"), ("(?i)([ti])a$", "\\1um"), ("(?i)(n)ews$", "\\1ews"), ("(?i)s$", ""), )
[docs] def pluralize(self, word): """Pluralizes nouns.""" return self._transform(self.PLURALIZE_RULES, word)
[docs] def singularize(self, word): """Singularizes nouns.""" return self._transform(self.SINGULARIZE_RULES, word, pluralize=False)
[docs] def cond_plural(self, number_of_records, word): """Returns the plural form of a word if first parameter is greater than 1""" if number_of_records != 1: return self.pluralize(word) return word
def _transform(self, rules, word, pluralize=True): return ( self._handle_nonchanging(word) or self._handle_irregular(word, pluralize=pluralize) or self._apply_rules(rules, word) or word ) def _handle_nonchanging(self, word): lower_cased_word = word.lower() # Check if word is an item or the suffix of any item in NONCHANGING_WORDS for nonchanging_word in self.NONCHANGING_WORDS: if lower_cased_word.endswith(nonchanging_word): return word def _handle_irregular(self, word, pluralize=True): for form_a, form_b in self.IRREGULAR_WORDS.items(): if not pluralize: form_a, form_b = form_b, form_a match = re.search(f"({form_a})$", word, re.IGNORECASE) if match: return re.sub(f"(?i){form_a}$", match.expand("\\1")[0] + form_b[1:], word) def _apply_rules(self, rules, word): for pattern, replacement in rules: if re.search(pattern, word): return re.sub(pattern, replacement, word)
# Copyright (c) 2006 Bermi Ferrer Martinez # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software to deal in this software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of this software, and to permit # persons to whom this software is furnished to do so, subject to the following # condition: # # THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THIS SOFTWARE OR THE USE OR OTHER DEALINGS IN # THIS SOFTWARE.