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bo-graduation/nltk-book/pattern-master/pattern/text/fr/inflect.py

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#### PATTERN | FR | INFLECT ########################################################################
# -*- coding: utf-8 -*-
# Copyright (c) 2013 University of Antwerp, Belgium
# Author: Tom De Smedt <tom@organisms.be>
# License: BSD (see LICENSE.txt for details).
####################################################################################################
# Regular expressions-based rules for French word inflection:
# - pluralization and singularization of nouns,
# - conjugation of verbs,
# - predicative and attributive of adjectives.
# Accuracy:
# 92% for pluralize()
# 93% for singularize()
# 80% for Verbs.find_lemma() (mixed regular/irregular)
# 86% for Verbs.find_lexeme() (mixed regular/irregular)
# 95% predicative() (measured on Lexique French morphology word forms)
from __future__ import unicode_literals
from __future__ import division
from builtins import str, bytes, dict, int
from builtins import map, zip, filter
from builtins import object, range
import os
import sys
import re
try:
MODULE = os.path.dirname(os.path.realpath(__file__))
except:
MODULE = ""
sys.path.insert(0, os.path.join(MODULE, "..", "..", "..", ".."))
from pattern.text import Verbs as _Verbs
from pattern.text import (
INFINITIVE, PRESENT, PAST, FUTURE,
FIRST, SECOND, THIRD,
SINGULAR, PLURAL, SG, PL,
INDICATIVE, IMPERATIVE, SUBJUNCTIVE, CONDITIONAL,
IMPERFECTIVE, PERFECTIVE, PROGRESSIVE,
IMPERFECT, PRETERITE,
PARTICIPLE, GERUND
)
sys.path.pop(0)
VERB, NOUN, ADJECTIVE, ADVERB = "VB", "NN", "JJ", "RB"
VOWELS = ("a", "e", "i", "o", "u")
re_vowel = re.compile(r"a|e|i|o|u", re.I)
is_vowel = lambda ch: ch in VOWELS
#### PLURALIZE #####################################################################################
plural_irregular = {
"bleu": "bleus",
"pneu": "pneus",
"travail": "travaux",
"vitrail": "vitraux"
}
def pluralize(word, pos=NOUN, custom={}):
""" Returns the plural of a given word.
The custom dictionary is for user-defined replacements.
"""
if word in custom:
return custom[word]
w = word.lower()
if w in plural_irregular:
return plural_irregular[w]
if w.endswith(("ais", "ois")):
return w + "es"
if w.endswith(("s", "x")):
return w
if w.endswith("al"):
return w[:-2] + "aux"
if w.endswith(("au", "eu")):
return w + "x"
return w + "s"
#### SINGULARIZE ###################################################################################
def singularize(word, pos=NOUN, custom={}):
if word in custom:
return custom[word]
w = word.lower()
# Common articles, determiners, pronouns:
if pos in ("DT", "PRP", "PRP$", "WP", "RB", "IN"):
if w == "du":
return "de"
if w == "ces":
return "ce"
if w == "les":
return "le"
if w == "des":
return "un"
if w == "mes":
return "mon"
if w == "ses":
return "son"
if w == "tes":
return "ton"
if w == "nos":
return "notre"
if w == "vos":
return "votre"
if w.endswith(("'", "’")):
return w[:-1] + "e"
if w.endswith("nnes"): # parisiennes => parisien
return w[:-3]
if w.endswith("ntes"): # passantes => passant
return w[:-2]
if w.endswith("euses"): # danseuses => danseur
return w[:-3] + "r"
if w.endswith("s"):
return w[:-1]
if w.endswith(("aux", "eux", "oux")):
return w[:-1]
if w.endswith("ii"):
return w[:-1] + "o"
if w.endswith(("ia", "ma")):
return w[:-1] + "um"
if "-" in w:
return singularize(w.split("-")[0]) + "-" + "-".join(w.split("-")[1:])
return w
#### VERB CONJUGATION ##############################################################################
verb_inflections = [
("issaient", "ir" ), ("eassions", "er" ), ("dissions", "dre" ), ("çassions", "cer" ),
( "eraient", "er" ), ( "assions", "er" ), ( "issions", "ir" ), ( "iraient", "ir" ),
( "isaient", "ire" ), ( "geaient", "ger" ), ( "eassent", "er" ), ( "geasses", "ger" ),
( "eassiez", "er" ), ( "dissiez", "dre" ), ( "dissent", "dre" ), ( "endrons", "endre"),
( "endriez", "endre"), ( "endrais", "endre"), ( "erions", "er" ), ( "assent", "er" ),
( "assiez", "er" ), ( "raient", "re" ), ( "issent", "ir" ), ( "issiez", "ir" ),
( "irions", "ir" ), ( "issons", "ir" ), ( "issant", "ir" ), ( "issait", "ir" ),
( "issais", "ir" ), ( "aient", "er" ), ( "èrent", "er" ), ( "erait", "er" ),
( "eront", "er" ), ( "erons", "er" ), ( "eriez", "er" ), ( "erais", "er" ),
( "asses", "er" ), ( "rions", "re" ), ( "isses", "ir" ), ( "irent", "ir" ),
( "irait", "ir" ), ( "irons", "ir" ), ( "iriez", "ir" ), ( "irais", "ir" ),
( "iront", "ir" ), ( "issez", "ir" ), ( "ions", "er" ), ( "erez", "er" ),
( "eras", "er" ), ( "erai", "er" ), ( "asse", "er" ), ( "âtes", "er" ),
( "âmes", "er" ), ( "isse", "ir" ), ( "îtes", "ir" ), ( "îmes", "ir" ),
( "irez", "ir" ), ( "iras", "ir" ), ( "irai", "ir" ), ( "ront", "re" ),
( "iez", "er" ), ( "ent", "er" ), ( "ais", "er" ), ( "ons", "er" ),
( "ait", "er" ), ( "ant", "er" ), ( "era", "er" ), ( "ira", "ir" ),
( "es", "er" ), ( "ez", "er" ), ( "as", "er" ), ( "ai", "er" ),
( "ât", "er" ), ( "ds", "dre" ), ( "is", "ir" ), ( "it", "ir" ),
( "ît", "ir" ), ( "ïr", "ïr" ), ( "nd", "ndre"), ( "nu", "nir" ),
( "e", "er" ), ( "é", "er" ), ( "a", "er" ), ( "t", "re" ),
( "s", "re" ), ( "i", "ir" ), ( "û", "ir" ), ( "u", "re" ),
( "d", "dre" )
]
class Verbs(_Verbs):
def __init__(self):
_Verbs.__init__(self, os.path.join(MODULE, "fr-verbs.txt"),
language = "fr",
default = {},
format = [
0, 1, 2, 3, 4, 5, 6, 8, 24, # indicatif présent
34, 35, 36, 37, 38, 39, # indicatif passé simple
17, 18, 19, 20, 21, 22, # indicatif imparfait
40, 41, 42, 43, 44, 45, # indicatif futur simple
46, 47, 48, 49, 50, 51, # conditionnel présent
52, 53, 54, # impératif présent
55, 56, 57, 58, 59, 60, # subjonctif présent
67, 68, 69, 70, 71, 72 # subjonctif imparfait
])
def find_lemma(self, verb):
""" Returns the base form of the given inflected verb, using a rule-based approach.
"""
# French has 20,000+ verbs, ending in -er (majority), -ir, -re.
v = verb.lower()
if v.endswith(("er", "ir", "re")):
return v
for a, b in verb_inflections:
if v.endswith(a):
return v[:-len(a)] + b
return v
def find_lexeme(self, verb):
""" For a regular verb (base form), returns the forms using a rule-based approach.
"""
v = verb.lower()
b = v[:-2]
if v.endswith("ir") and not \
v.endswith(("couvrir", "cueillir", "découvrir", "offrir", "ouvrir", "souffrir")):
# Regular inflection for verbs ending in -ir.
# Some -ir verbs drop the last letter of the stem: dormir => je dors (not: je dormis).
if v.endswith(("dormir", "mentir", "partir", "sentir", "servir", "sortir")):
b0 = b[:-1]
else:
b0 = b + "i"
return [v,
b0 + "s", b0 + "s", b0 + "t", b + "issons", b + "issez", b + "issent", b + "issant", b + "i",
b + "is", b + "is", b + "it", b + "îmes", b + "îtes", b + "irent",
b + "issais", b + "issais", b + "issait", b + "issions", b + "issiez", b + "issaient",
v + "ai", v + "as", v + "a", v + "ons", v + "ez", v + "ont",
v + "ais", v + "ais", v + "ait", v + "ions", v + "iez", v + "aient",
b + "is", b + "issons", b + "issez",
b + "isse", b + "isses", b + "isse", b + "issions", b + "issiez", b + "issent",
b + "isse", b + "isses", b + "ît", b + "issions", b + "issiez", b + "issent"
]
elif v.endswith("re"):
# Regular inflection for verbs ending in -re.
# Verbs ending in -attre and -ettre drop the -t in the singular form.
if v.endswith(("ttre")):
b0 = b1 = b[:-1]
else:
b0 = b1 = b
# Verbs ending in -aindre, -eindre and -oindre drop the -d.
if v.endswith("indre"):
b0, b1 = b[:-1], b[:-2] + "gn"
# Verbs ending in -prendre drop the -d in the plural form.
if v.endswith("prendre"):
b0, b1 = b, b[:-1]
return [v,
b0 + "s", b0 + "s", b0 + "", b1 + "ons", b1 + "ez", b1 + "ent", b1 + "ant", b + "u",
b + "is", b + "is", b + "it", b1 + "îmes", b1 + "îtes", b1 + "irent",
b + "ais", b + "ais", b + "ait", b1 + "ions", b1 + "iez", b1 + "aient",
b + "rai", b + "ras", b + "ra", b + "rons", b + "rez", b + "ront",
b + "ais", b + "ais", b + "ait", b1 + "ions", b1 + "iez", b1 + "aient",
b0 + "s", b1 + "ons", b1 + "ez",
b + "e", b + "es", b + "e", b1 + "ions", b1 + "iez", b1 + "ent",
b + "isse", b + "isses", b + "ît", b1 + "issions", b1 + "issiez", b1 + "issent"
]
else:
# Regular inflection for verbs ending in -er.
# If the stem ends in -g, use -ge before hard vowels -a and -o: manger => mangeons.
# If the stem ends in -c, use -ç before hard vowels -a and -o: lancer => lançons.
e = v.endswith("ger") and "e" or ""
c = v.endswith("cer") and b[:-1] + "ç" or b
return [v,
b + "e", b + "es", b + "e", c + e + "ons", b + "ez", b + "ent", c + e + "ant", b + "é",
c + e + "ai", c + e + "as", c + e + "a", c + e + "âmes", c + e + "âtes", b + "èrent",
c + e + "ais", c + e + "ais", c + e + "ait", b + "ions", b + "iez", c + e + "aient",
v + "ai", v + "as", v + "a", v + "ons", v + "ez", v + "ont",
v + "ais", v + "ais", v + "ait", v + "ions", v + "iez", v + "aient",
b + "e", c + e + "ons", b + "ez",
b + "e", b + "es", b + "e", b + "ions", b + "iez", b + "ent",
c + e + "asse", c + e + "asses", c + e + "ât", c + e + "assions", c + e + "assiez", c + e + "assent"
]
verbs = Verbs()
conjugate, lemma, lexeme, tenses = \
verbs.conjugate, verbs.lemma, verbs.lexeme, verbs.tenses
#### ATTRIBUTIVE & PREDICATIVE #####################################################################
def attributive(adjective):
""" For a predicative adjective, returns the attributive form.
"""
# Must deal with feminine and plural.
raise NotImplementedError
def predicative(adjective):
""" Returns the predicative adjective (lowercase): belles => beau.
"""
w = adjective.lower()
if w.endswith(("ais", "ois")):
return w
if w.endswith(("és", "ée", "ées")):
return w.rstrip("es")
if w.endswith(("que", "ques")):
return w.rstrip("s")
if w.endswith(("nts", "nte", "ntes")):
return w.rstrip("es")
if w.endswith("eaux"):
return w.rstrip("x")
if w.endswith(("aux", "ale", "ales")):
return w.rstrip("uxles") + "l"
if w.endswith(("rteuse", "rteuses", "ailleuse")):
return w.rstrip("es") + "r"
if w.endswith(("euse", "euses")):
return w.rstrip("es") + "x"
if w.endswith(("els", "elle", "elles")):
return w.rstrip("les") + "el"
if w.endswith(("ifs", "ive", "ives")):
return w.rstrip("es")[:-2] + "if"
if w.endswith(("is", "ie", "ies")):
return w.rstrip("es")
if w.endswith(("enne", "ennes")):
return w.rstrip("nes") + "en"
if w.endswith(("onne", "onnes")):
return w.rstrip("nes") + "n"
if w.endswith(("igne", "ignes", "ingue", "ingues")):
return w.rstrip("s")
if w.endswith(("ène", "ènes")):
return w.rstrip("s")
if w.endswith(("ns", "ne", "nes")):
return w.rstrip("es")
if w.endswith(("ite", "ites")):
return w.rstrip("es")
if w.endswith(("is", "ise", "ises")):
return w.rstrip("es") + "s"
if w.endswith(("rice", "rices")):
return w.rstrip("rices") + "eur"
if w.endswith(("iers", "ière", "ières")):
return w.rstrip("es")[:-3] + "ier"
if w.endswith(("ette", "ettes")):
return w.rstrip("tes") + "et"
if w.endswith(("rds", "rde", "rdes")):
return w.rstrip("es")
if w.endswith(("nds", "nde", "ndes")):
return w.rstrip("es")
if w.endswith(("us", "ue", "ues")):
return w.rstrip("es")
return w.rstrip("s")