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* Refactor language-independent tagger class
This commit is contained in:
Matthew Honnibal
parent
a3d5e6c0dd
commit
b4faf551f5
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@ -4,24 +4,23 @@ from cymem.cymem cimport Pool
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from ._ml cimport Model
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from .strings cimport StringStore
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from .structs cimport TokenC, LexemeC, Morphology, PosTag
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from .structs cimport TokenC, LexemeC
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from .parts_of_speech cimport univ_pos_t
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from .vocab cimport Vocab
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cdef class Tagger:
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cdef readonly Pool mem
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cdef readonly StringStore strings
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cdef readonly Model model
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cdef readonly Vocab vocab
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cdef public object lemmatizer
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cdef PreshMapArray _morph_cache
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cdef public dict freqs
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cdef PosTag* tags
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cdef readonly object tag_names
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cdef readonly object tag_map
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cdef readonly int n_tags
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cdef int predict(self, int i, const TokenC* tokens) except -1
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cdef int update(self, int i, const TokenC* tokens, int gold) except -1
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cdef int set_morph(self, const int i, const PosTag* tag, TokenC* tokens) except -1
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cdef int lemmatize(self, const univ_pos_t pos, const LexemeC* lex) except -1
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#cdef int set_morph(self, const int i, const PosTag* tag, TokenC* tokens) except -1
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#cdef int lemmatize(self, const univ_pos_t pos, const LexemeC* lex) except -1
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223
spacy/tagger.pyx
223
spacy/tagger.pyx
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@ -6,50 +6,129 @@ from thinc.typedefs cimport atom_t, weight_t
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from .typedefs cimport attr_t
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from .tokens.doc cimport Doc
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from .morphology cimport set_morph_from_dict
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from .attrs cimport TAG
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from .parts_of_speech cimport NO_TAG, ADJ, ADV, ADP, CONJ, DET, NOUN, NUM, PRON
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from .parts_of_speech cimport PRT, VERB, X, PUNCT, EOL, SPACE
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from .attrs cimport *
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from ._ml cimport arg_max
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cdef struct _CachedMorph:
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Morphology morph
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int lemma
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cpdef enum:
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P2_orth
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P2_cluster
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P2_shape
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P2_prefix
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P2_suffix
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P2_pos
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P2_lemma
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P2_flags
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P1_orth
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P1_cluster
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P1_shape
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P1_prefix
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P1_suffix
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P1_pos
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P1_lemma
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P1_flags
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W_orth
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W_cluster
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W_shape
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W_prefix
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W_suffix
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W_pos
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W_lemma
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W_flags
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N1_orth
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N1_cluster
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N1_shape
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N1_prefix
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N1_suffix
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N1_pos
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N1_lemma
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N1_flags
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N2_orth
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N2_cluster
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N2_shape
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N2_prefix
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N2_suffix
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N2_pos
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N2_lemma
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N2_flags
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N_CONTEXT_FIELDS
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cdef class Tagger:
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"""A part-of-speech tagger for English"""
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@classmethod
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def read_config(cls, data_dir):
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return json.load(open(path.join(data_dir, 'pos', 'config.json')))
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@classmethod
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def default_templates(cls):
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return (
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(W_orth,),
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(P1_lemma, P1_pos),
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(P2_lemma, P2_pos),
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(N1_orth,),
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(N2_orth,),
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(W_suffix,),
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(W_prefix,),
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(P1_pos,),
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(P2_pos,),
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(P1_pos, P2_pos),
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(P1_pos, W_orth),
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(P1_suffix,),
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(N1_suffix,),
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(W_shape,),
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(W_cluster,),
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(N1_cluster,),
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(N2_cluster,),
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(P1_cluster,),
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(P2_cluster,),
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(W_flags,),
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(N1_flags,),
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(N2_flags,),
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(P1_flags,),
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(P2_flags,),
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)
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def make_lemmatizer(self):
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return None
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def __init__(self, StringStore strings, data_dir):
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def __init__(self, Vocab vocab, templates):
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self.mem = Pool()
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model_dir = path.join(data_dir, 'pos')
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self.strings = strings
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cfg = json.load(open(path.join(data_dir, 'pos', 'config.json')))
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self.tag_names = sorted(cfg['tag_names'])
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assert self.tag_names
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self.n_tags = len(self.tag_names)
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self.tag_map = cfg['tag_map']
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cdef int n_tags = len(self.tag_names) + 1
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self.vocab = vocab
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self.model = Model(n_tags, cfg['templates'], model_dir)
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self._morph_cache = PreshMapArray(n_tags)
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self.tags = <PosTag*>self.mem.alloc(n_tags, sizeof(PosTag))
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for i, tag in enumerate(sorted(self.tag_names)):
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pos, props = self.tag_map[tag]
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self.tags[i].id = i
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self.tags[i].pos = pos
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set_morph_from_dict(&self.tags[i].morph, props)
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if path.exists(path.join(data_dir, 'tokenizer', 'morphs.json')):
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self.load_morph_exceptions(json.load(open(path.join(data_dir, 'tokenizer',
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'morphs.json'))))
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self.lemmatizer = self.make_lemmatizer(data_dir)
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cdef int n_tags = self.vocab.morphology.n_tags + 1
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self.model = Model(n_tags, templates)
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self.freqs = {TAG: defaultdict(int)}
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for tag in self.tag_names:
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self.freqs[TAG][self.strings[tag]] = 1
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self.freqs[TAG][self.vocab.strings[tag]] = 1
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self.freqs[TAG][0] = 1
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@property
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def tag_names(self):
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return tuple(sorted(self.vocab.morphology.tag_map.keys()))
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@classmethod
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def from_dir(cls, data_dir, vocab):
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if path.exists(path.join(data_dir, 'templates.json')):
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templates = json.loads(open(path.join(data_dir, 'templates.json')))
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else:
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templates = cls.default_templates()
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return cls(vocab, templates)
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def __call__(self, Doc tokens):
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"""Apply the tagger, setting the POS tags onto the Doc object.
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@ -63,18 +142,14 @@ cdef class Tagger:
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for i in range(tokens.length):
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if tokens.data[i].pos == 0:
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guess = self.predict(i, tokens.data)
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tokens.data[i].tag = self.strings[self.tag_names[guess]]
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self.set_morph(i, &self.tags[guess], tokens.data)
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self.vocab.morphology.assign_tag(&tokens.data[i], guess)
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tokens.is_tagged = True
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tokens._py_tokens = [None] * tokens.length
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def tag_from_strings(self, Doc tokens, object tag_strs):
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cdef int i
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for i in range(tokens.length):
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tokens.data[i].tag = self.strings[tag_strs[i]]
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self.set_morph(i, &self.tags[self.tag_names.index(tag_strs[i])],
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tokens.data)
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self.vocab.morphology.assign_tag(&tokens.data[i], tag_strs[i])
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tokens.is_tagged = True
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tokens._py_tokens = [None] * tokens.length
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@ -88,57 +163,51 @@ cdef class Tagger:
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for i in range(tokens.length):
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guess = self.update(i, tokens.data, golds[i])
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loss = golds[i] != -1 and guess != golds[i]
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tokens.data[i].tag = self.strings[self.tag_names[guess]]
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self.set_morph(i, &self.tags[guess], tokens.data)
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self.vocab.morphology.assign_tag(&tokens.data[i], guess)
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correct += loss == 0
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self.freqs[TAG][tokens.data[i].tag] += 1
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return correct
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cdef int predict(self, int i, const TokenC* tokens) except -1:
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raise NotImplementedError
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cdef atom_t[N_CONTEXT_FIELDS] context
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_fill_from_token(&context[P2_orth], &tokens[i-2])
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_fill_from_token(&context[P1_orth], &tokens[i-1])
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_fill_from_token(&context[W_orth], &tokens[i])
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_fill_from_token(&context[N1_orth], &tokens[i+1])
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_fill_from_token(&context[N2_orth], &tokens[i+2])
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scores = self.model.score(context)
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return arg_max(scores, self.model.n_classes)
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cdef int update(self, int i, const TokenC* tokens, int gold) except -1:
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raise NotImplementedError
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cdef atom_t[N_CONTEXT_FIELDS] context
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_fill_from_token(&context[P2_orth], &tokens[i-2])
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_fill_from_token(&context[P1_orth], &tokens[i-1])
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_fill_from_token(&context[W_orth], &tokens[i])
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_fill_from_token(&context[N1_orth], &tokens[i+1])
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_fill_from_token(&context[N2_orth], &tokens[i+2])
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scores = self.model.score(context)
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guess = arg_max(scores, self.model.n_classes)
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loss = guess != gold if gold != -1 else 0
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self.model.update(context, guess, gold, loss)
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return guess
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cdef int set_morph(self, const int i, const PosTag* tag, TokenC* tokens) except -1:
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tokens[i].pos = tag.pos
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cached = <_CachedMorph*>self._morph_cache.get(tag.id, tokens[i].lex.orth)
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if cached is NULL:
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cached = <_CachedMorph*>self.mem.alloc(1, sizeof(_CachedMorph))
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cached.lemma = self.lemmatize(tag.pos, tokens[i].lex)
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cached.morph = tag.morph
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self._morph_cache.set(tag.id, tokens[i].lex.orth, <void*>cached)
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tokens[i].lemma = cached.lemma
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tokens[i].morph = cached.morph
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cdef int lemmatize(self, const univ_pos_t pos, const LexemeC* lex) except -1:
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if self.lemmatizer is None:
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return lex.orth
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cdef unicode py_string = self.strings[lex.orth]
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if pos != NOUN and pos != VERB and pos != ADJ:
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return lex.orth
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cdef set lemma_strings
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cdef unicode lemma_string
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lemma_strings = self.lemmatizer(py_string, pos)
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lemma_string = sorted(lemma_strings)[0]
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lemma = self.strings[lemma_string]
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return lemma
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def load_morph_exceptions(self, dict exc):
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cdef unicode pos_str
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cdef unicode form_str
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cdef unicode lemma_str
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cdef dict entries
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cdef dict props
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cdef int lemma
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cdef attr_t orth
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cdef int pos
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for pos_str, entries in exc.items():
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pos = self.tag_names.index(pos_str)
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for form_str, props in entries.items():
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lemma_str = props.get('L', form_str)
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orth = self.strings[form_str]
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cached = <_CachedMorph*>self.mem.alloc(1, sizeof(_CachedMorph))
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cached.lemma = self.strings[lemma_str]
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set_morph_from_dict(&cached.morph, props)
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self._morph_cache.set(pos, orth, <void*>cached)
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cdef inline void _fill_from_token(atom_t* context, const TokenC* t) nogil:
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context[0] = t.lex.lower
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context[1] = t.lex.cluster
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context[2] = t.lex.shape
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context[3] = t.lex.prefix
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context[4] = t.lex.suffix
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context[5] = t.tag
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context[6] = t.lemma
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if t.lex.flags & (1 << IS_ALPHA):
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context[7] = 1
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elif t.lex.flags & (1 << IS_PUNCT):
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context[7] = 2
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elif t.lex.flags & (1 << LIKE_URL):
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context[7] = 3
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elif t.lex.flags & (1 << LIKE_NUM):
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context[7] = 4
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else:
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context[7] = 0
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