* Split EnPosTagger up into base class and subclass

setup.py

@@ -153,7 +153,7 @@ def main(modules, is_pypy):
 
 MOD_NAMES = ['spacy.parts_of_speech', 'spacy.strings',
              'spacy.lexeme', 'spacy.vocab', 'spacy.attrs',
-             'spacy.morphology', 
+             'spacy.morphology', 'spacy.tagger',
              'spacy.syntax.stateclass', 
              'spacy._ml', 'spacy._theano',
              'spacy.tokenizer', 'spacy.en.attrs',

spacy/en/pos.pxd

@@ -1,26 +1,5 @@
-from preshed.maps cimport PreshMapArray
+from ..tagger cimport Tagger
-from preshed.counter cimport PreshCounter
-from cymem.cymem cimport Pool
-
-from .._ml cimport Model
-from ..strings cimport StringStore
-from ..structs cimport TokenC, LexemeC, Morphology, PosTag
-from ..parts_of_speech cimport univ_pos_t
-from .lemmatizer import Lemmatizer
 
 
-cdef class EnPosTagger:
+cdef class EnPosTagger(Tagger):
-    cdef readonly Pool mem
+    pass
-    cdef readonly StringStore strings
-    cdef readonly Model model
-    cdef public object lemmatizer
-    cdef PreshMapArray _morph_cache
-    cdef public dict freqs
-
-    cdef PosTag* tags
-    cdef readonly object tag_names
-    cdef readonly object tag_map
-    cdef readonly int n_tags
-
-    cdef int set_morph(self, const int i, const PosTag* tag, TokenC* tokens) except -1
-    cdef int lemmatize(self, const univ_pos_t pos, const LexemeC* lex) except -1

spacy/en/pos.pyx

@@ -218,155 +218,34 @@ POS_TEMPLATES = (
 )
 
 
-cdef struct _CachedMorph:
+cdef class EnPosTagger(Tagger):
-    Morphology morph
-    int lemma
-
-
-def setup_model_dir(tag_names, tag_map, templates, model_dir):
-    if path.exists(model_dir):
-        shutil.rmtree(model_dir)
-    os.mkdir(model_dir)
-    config = {
-        'templates': templates,
-        'tag_names': tag_names,
-        'tag_map': tag_map
-    }
-    with open(path.join(model_dir, 'config.json'), 'w') as file_:
-        json.dump(config, file_)
-
-
-cdef class EnPosTagger:
     """A part-of-speech tagger for English"""
-    def __init__(self, StringStore strings, data_dir):
+    def make_lemmatizer(self, data_dir):
-        self.mem = Pool()
+        return Lemmatizer(path.join(data_dir, 'wordnet'), NOUN, VERB, ADJ)
-        model_dir = path.join(data_dir, 'pos')
-        self.strings = strings
-        cfg = json.load(open(path.join(data_dir, 'pos', 'config.json')))
-        self.tag_names = sorted(cfg['tag_names'])
-        assert self.tag_names
-        self.n_tags = len(self.tag_names)
-        self.tag_map = cfg['tag_map']
-        cdef int n_tags = len(self.tag_names) + 1
     
-        self.model = Model(n_tags, cfg['templates'], model_dir)
+    cdef int predict(self, int i, const TokenC* tokens) except -1:
-        self._morph_cache = PreshMapArray(n_tags)
-        self.tags = <PosTag*>self.mem.alloc(n_tags, sizeof(PosTag))
-        for i, tag in enumerate(sorted(self.tag_names)):
-            pos, props = self.tag_map[tag]
-            self.tags[i].id = i
-            self.tags[i].pos = pos
-            set_morph_from_dict(&self.tags[i].morph, props)
-        if path.exists(path.join(data_dir, 'tokenizer', 'morphs.json')):
-            self.load_morph_exceptions(json.load(open(path.join(data_dir, 'tokenizer',
-                                                 'morphs.json'))))
-        self.lemmatizer = Lemmatizer(path.join(data_dir, 'wordnet'), NOUN, VERB, ADJ)
-        self.freqs = {TAG: defaultdict(int)}
-        for tag in self.tag_names:
-            self.freqs[TAG][self.strings[tag]] = 1
-        self.freqs[TAG][0] = 1
-
-    def __call__(self, Doc tokens):
-        """Apply the tagger, setting the POS tags onto the Doc object.
-
-        Args:
-            tokens (Doc): The tokens to be tagged.
-        """
-        if tokens.length == 0:
-            return 0
-        cdef int i
         cdef atom_t[N_CONTEXT_FIELDS] context
-        cdef const weight_t* scores
-        for i in range(tokens.length):
-            if tokens.data[i].pos == 0:
-                fill_context(context, i, tokens.data)
-                scores = self.model.score(context)
-                guess = arg_max(scores, self.model.n_classes)
-                tokens.data[i].tag = self.strings[self.tag_names[guess]]
-                self.set_morph(i, &self.tags[guess], tokens.data)
-
-        tokens.is_tagged = True
-        tokens._py_tokens = [None] * tokens.length
-
-    def tag_from_strings(self, Doc tokens, object tag_strs):
-        cdef int i
-        for i in range(tokens.length):
-            tokens.data[i].tag = self.strings[tag_strs[i]]
-            self.set_morph(i, &self.tags[self.tag_names.index(tag_strs[i])],
-                           tokens.data)
-        tokens.is_tagged = True
-        tokens._py_tokens = [None] * tokens.length
-
-    def train(self, Doc tokens, object gold_tag_strs):
-        cdef int i
-        cdef int loss
-        cdef atom_t[N_CONTEXT_FIELDS] context
-        cdef const weight_t* scores
-        golds = [self.tag_names.index(g) if g is not None else -1
-                 for g in gold_tag_strs]
-        correct = 0
-        for i in range(tokens.length):
-            fill_context(context, i, tokens.data)
-            scores = self.model.score(context)
-            guess = arg_max(scores, self.model.n_classes)
-            loss = guess != golds[i] if golds[i] != -1 else 0
-            self.model.update(context, guess, golds[i], loss)
-            tokens.data[i].tag = self.strings[self.tag_names[guess]]
-            self.set_morph(i, &self.tags[guess], tokens.data)
-            correct += loss == 0
-            self.freqs[TAG][tokens.data[i].tag] += 1
-        return correct
-
-    cdef int set_morph(self, const int i, const PosTag* tag, TokenC* tokens) except -1:
-        tokens[i].pos = tag.pos
-        cached = <_CachedMorph*>self._morph_cache.get(tag.id, tokens[i].lex.orth)
-        if cached is NULL:
-            cached = <_CachedMorph*>self.mem.alloc(1, sizeof(_CachedMorph))
-            cached.lemma = self.lemmatize(tag.pos, tokens[i].lex)
-            cached.morph = tag.morph
-            self._morph_cache.set(tag.id, tokens[i].lex.orth, <void*>cached)
-        tokens[i].lemma = cached.lemma
-        tokens[i].morph = cached.morph
-
-    cdef int lemmatize(self, const univ_pos_t pos, const LexemeC* lex) except -1:
-        if self.lemmatizer is None:
-            return lex.orth
-        cdef unicode py_string = self.strings[lex.orth]
-        if pos != NOUN and pos != VERB and pos != ADJ:
-            return lex.orth
-        cdef set lemma_strings
-        cdef unicode lemma_string
-        lemma_strings = self.lemmatizer(py_string, pos)
-        lemma_string = sorted(lemma_strings)[0]
-        lemma = self.strings[lemma_string]
-        return lemma
-
-    def load_morph_exceptions(self, dict exc):
-        cdef unicode pos_str
-        cdef unicode form_str
-        cdef unicode lemma_str
-        cdef dict entries
-        cdef dict props
-        cdef int lemma
-        cdef attr_t orth
-        cdef int pos
-        for pos_str, entries in exc.items():
-            pos = self.tag_names.index(pos_str)
-            for form_str, props in entries.items():
-                lemma_str = props.get('L', form_str)
-                orth = self.strings[form_str]
-                cached = <_CachedMorph*>self.mem.alloc(1, sizeof(_CachedMorph))
-                cached.lemma = self.strings[lemma_str]
-                set_morph_from_dict(&cached.morph, props)
-                self._morph_cache.set(pos, orth, <void*>cached)
-
-
-cdef int fill_context(atom_t* context, const int i, const TokenC* tokens) except -1:
         _fill_from_token(&context[P2_orth], &tokens[i-2])
         _fill_from_token(&context[P1_orth], &tokens[i-1])
         _fill_from_token(&context[W_orth], &tokens[i])
         _fill_from_token(&context[N1_orth], &tokens[i+1])
         _fill_from_token(&context[N2_orth], &tokens[i+2])
+        scores = self.model.score(context)
+        return arg_max(scores, self.model.n_classes)
+
+    cdef int update(self, int i, const TokenC* tokens, int gold) except -1:
+        cdef atom_t[N_CONTEXT_FIELDS] context
+        _fill_from_token(&context[P2_orth], &tokens[i-2])
+        _fill_from_token(&context[P1_orth], &tokens[i-1])
+        _fill_from_token(&context[W_orth], &tokens[i])
+        _fill_from_token(&context[N1_orth], &tokens[i+1])
+        _fill_from_token(&context[N2_orth], &tokens[i+2])
+        scores = self.model.score(context)
+        guess = arg_max(scores, self.model.n_classes)
+        loss = guess != gold if gold != -1 else 0
+        self.model.update(context, guess, gold, loss)
+        return guess
+ 
 
 
 cdef inline void _fill_from_token(atom_t* context, const TokenC* t) nogil:

spacy/tagger.pxd

@@ -0,0 +1,27 @@
+from preshed.maps cimport PreshMapArray
+from preshed.counter cimport PreshCounter
+from cymem.cymem cimport Pool
+
+from ._ml cimport Model
+from .strings cimport StringStore
+from .structs cimport TokenC, LexemeC, Morphology, PosTag
+from .parts_of_speech cimport univ_pos_t
+
+
+cdef class Tagger:
+    cdef readonly Pool mem
+    cdef readonly StringStore strings
+    cdef readonly Model model
+    cdef public object lemmatizer
+    cdef PreshMapArray _morph_cache
+    cdef public dict freqs
+
+    cdef PosTag* tags
+    cdef readonly object tag_names
+    cdef readonly object tag_map
+    cdef readonly int n_tags
+
+    cdef int predict(self, int i, const TokenC* tokens) except -1
+    cdef int update(self, int i, const TokenC* tokens, int gold) except -1
+    cdef int set_morph(self, const int i, const PosTag* tag, TokenC* tokens) except -1
+    cdef int lemmatize(self, const univ_pos_t pos, const LexemeC* lex) except -1

spacy/tagger.pyx

@@ -0,0 +1,144 @@
+import json
+from os import path
+from collections import defaultdict
+
+from thinc.typedefs cimport atom_t, weight_t
+
+from .typedefs cimport attr_t
+from .tokens.doc cimport Doc
+from .morphology cimport set_morph_from_dict
+from .attrs cimport TAG
+from .parts_of_speech cimport NO_TAG, ADJ, ADV, ADP, CONJ, DET, NOUN, NUM, PRON
+from .parts_of_speech cimport PRT, VERB, X, PUNCT, EOL, SPACE
+
+ 
+cdef struct _CachedMorph:
+    Morphology morph
+    int lemma
+
+
+cdef class Tagger:
+    """A part-of-speech tagger for English"""
+    def make_lemmatizer(self):
+        return None
+
+    def __init__(self, StringStore strings, data_dir):
+        self.mem = Pool()
+        model_dir = path.join(data_dir, 'pos')
+        self.strings = strings
+        cfg = json.load(open(path.join(data_dir, 'pos', 'config.json')))
+        self.tag_names = sorted(cfg['tag_names'])
+        assert self.tag_names
+        self.n_tags = len(self.tag_names)
+        self.tag_map = cfg['tag_map']
+        cdef int n_tags = len(self.tag_names) + 1
+
+        self.model = Model(n_tags, cfg['templates'], model_dir)
+        self._morph_cache = PreshMapArray(n_tags)
+        self.tags = <PosTag*>self.mem.alloc(n_tags, sizeof(PosTag))
+        for i, tag in enumerate(sorted(self.tag_names)):
+            pos, props = self.tag_map[tag]
+            self.tags[i].id = i
+            self.tags[i].pos = pos
+            set_morph_from_dict(&self.tags[i].morph, props)
+        if path.exists(path.join(data_dir, 'tokenizer', 'morphs.json')):
+            self.load_morph_exceptions(json.load(open(path.join(data_dir, 'tokenizer',
+                                                 'morphs.json'))))
+        self.lemmatizer = self.make_lemmatizer(data_dir)
+        self.freqs = {TAG: defaultdict(int)}
+        for tag in self.tag_names:
+            self.freqs[TAG][self.strings[tag]] = 1
+        self.freqs[TAG][0] = 1
+
+    def __call__(self, Doc tokens):
+        """Apply the tagger, setting the POS tags onto the Doc object.
+
+        Args:
+            tokens (Doc): The tokens to be tagged.
+        """
+        if tokens.length == 0:
+            return 0
+        cdef int i
+        cdef const weight_t* scores
+        for i in range(tokens.length):
+            if tokens.data[i].pos == 0:
+                guess = self.predict(i, tokens.data)
+                tokens.data[i].tag = self.strings[self.tag_names[guess]]
+                self.set_morph(i, &self.tags[guess], tokens.data)
+
+        tokens.is_tagged = True
+        tokens._py_tokens = [None] * tokens.length
+
+    def tag_from_strings(self, Doc tokens, object tag_strs):
+        cdef int i
+        for i in range(tokens.length):
+            tokens.data[i].tag = self.strings[tag_strs[i]]
+            self.set_morph(i, &self.tags[self.tag_names.index(tag_strs[i])],
+                           tokens.data)
+        tokens.is_tagged = True
+        tokens._py_tokens = [None] * tokens.length
+
+    def train(self, Doc tokens, object gold_tag_strs):
+        cdef int i
+        cdef int loss
+        cdef const weight_t* scores
+        golds = [self.tag_names.index(g) if g is not None else -1
+                 for g in gold_tag_strs]
+        correct = 0
+        for i in range(tokens.length):
+            guess = self.update(i, tokens.data, golds[i])
+            loss = golds[i] != -1 and guess != golds[i]
+            tokens.data[i].tag = self.strings[self.tag_names[guess]]
+            self.set_morph(i, &self.tags[guess], tokens.data)
+            correct += loss == 0
+            self.freqs[TAG][tokens.data[i].tag] += 1
+        return correct
+
+    cdef int predict(self, int i, const TokenC* tokens) except -1:
+        raise NotImplementedError
+
+    cdef int update(self, int i, const TokenC* tokens, int gold) except -1:
+        raise NotImplementedError
+
+    cdef int set_morph(self, const int i, const PosTag* tag, TokenC* tokens) except -1:
+        tokens[i].pos = tag.pos
+        cached = <_CachedMorph*>self._morph_cache.get(tag.id, tokens[i].lex.orth)
+        if cached is NULL:
+            cached = <_CachedMorph*>self.mem.alloc(1, sizeof(_CachedMorph))
+            cached.lemma = self.lemmatize(tag.pos, tokens[i].lex)
+            cached.morph = tag.morph
+            self._morph_cache.set(tag.id, tokens[i].lex.orth, <void*>cached)
+        tokens[i].lemma = cached.lemma
+        tokens[i].morph = cached.morph
+
+    cdef int lemmatize(self, const univ_pos_t pos, const LexemeC* lex) except -1:
+        if self.lemmatizer is None:
+            return lex.orth
+        cdef unicode py_string = self.strings[lex.orth]
+        if pos != NOUN and pos != VERB and pos != ADJ:
+            return lex.orth
+        cdef set lemma_strings
+        cdef unicode lemma_string
+        lemma_strings = self.lemmatizer(py_string, pos)
+        lemma_string = sorted(lemma_strings)[0]
+        lemma = self.strings[lemma_string]
+        return lemma
+
+    def load_morph_exceptions(self, dict exc):
+        cdef unicode pos_str
+        cdef unicode form_str
+        cdef unicode lemma_str
+        cdef dict entries
+        cdef dict props
+        cdef int lemma
+        cdef attr_t orth
+        cdef int pos
+        for pos_str, entries in exc.items():
+            pos = self.tag_names.index(pos_str)
+            for form_str, props in entries.items():
+                lemma_str = props.get('L', form_str)
+                orth = self.strings[form_str]
+                cached = <_CachedMorph*>self.mem.alloc(1, sizeof(_CachedMorph))
+                cached.lemma = self.strings[lemma_str]
+                set_morph_from_dict(&cached.morph, props)
+                self._morph_cache.set(pos, orth, <void*>cached)