mirror of
https://github.com/explosion/spaCy.git
synced 2024-12-26 18:06:29 +03:00
91 lines
2.0 KiB
Python
91 lines
2.0 KiB
Python
from os import path
|
|
|
|
|
|
NOUN_RULES = (
|
|
('s', ''),
|
|
('ses', 's'),
|
|
('ves', 'f'),
|
|
('xes', 'x'),
|
|
('zes', 'z'),
|
|
('ches', 'ch'),
|
|
('shes', 'sh'),
|
|
('men', 'man'),
|
|
('ies', 'y')
|
|
)
|
|
|
|
|
|
VERB_RULES = (
|
|
("s", ""),
|
|
("ies", "y"),
|
|
("es", "e"),
|
|
("es", ""),
|
|
("ed", "e"),
|
|
("ed", ""),
|
|
("ing", "e"),
|
|
("ing", "")
|
|
)
|
|
|
|
|
|
ADJ_RULES = (
|
|
("er", ""),
|
|
("est", ""),
|
|
("er", "e"),
|
|
("est", "e")
|
|
)
|
|
|
|
|
|
class Lemmatizer(object):
|
|
def __init__(self, wn_dict_dir):
|
|
self.index = {}
|
|
self.exc = {}
|
|
for pos in ['adj', 'adv', 'noun', 'verb']:
|
|
self.index[pos] = read_index(path.join(wn_dict_dir, 'index.%s' % pos))
|
|
self.exc[pos] = read_exc(path.join(wn_dict_dir, '%s.exc' % pos))
|
|
|
|
def noun(self, string):
|
|
return lemmatize(string, self.index['noun'], self.exc['noun'], NOUN_RULES)
|
|
|
|
def verb(self, string):
|
|
return lemmatize(string, self.index['verb'], self.exc['verb'], VERB_RULES)
|
|
|
|
def adj(self, string):
|
|
return lemmatize(string, self.index['adj'], self.exc['adj'], ADJ_RULES)
|
|
|
|
|
|
def lemmatize(string, index, exceptions, rules):
|
|
string = string.lower()
|
|
forms = []
|
|
if string in index:
|
|
forms.append(string)
|
|
forms.extend(exceptions.get(string, []))
|
|
for old, new in rules:
|
|
if string.endswith(old):
|
|
form = string[:len(string) - len(old)] + new
|
|
if form in index:
|
|
forms.append(form)
|
|
if not forms:
|
|
forms.append(string)
|
|
return set(forms)
|
|
|
|
|
|
def read_index(loc):
|
|
index = set()
|
|
for line in open(loc):
|
|
if line.startswith(' '):
|
|
continue
|
|
pieces = line.split()
|
|
word = pieces[0]
|
|
if word.count('_') == 0:
|
|
index.add(word)
|
|
return index
|
|
|
|
|
|
def read_exc(loc):
|
|
exceptions = {}
|
|
for line in open(loc):
|
|
if line.startswith(' '):
|
|
continue
|
|
pieces = line.split()
|
|
exceptions[pieces[0]] = tuple(pieces[1:])
|
|
return exceptions
|