* Update to use thinc 3.0

spacy/_ml.pyx

@@ -10,6 +10,8 @@ import json
 import cython
 import numpy.random
 
+from libc.string cimport memcpy
+
 from thinc.features cimport Feature, count_feats
 from thinc.api cimport Example
 
@@ -52,28 +54,12 @@ cdef class Model:
     cdef const weight_t* score(self, atom_t* context) except NULL:
         memcpy(self._eg.c.atoms, context, self._eg.c.nr_atom * sizeof(context[0]))
         self._model(self._eg)
-        return self._eg.scores
+        return self._eg.c.scores
 
     cdef int set_scores(self, weight_t* scores, atom_t* context) nogil:
-        cdef int nr_feat = self._model.extractor.set_feats(self._eg.features, context)
+        cdef int nr_feat = self._extractor.set_feats(self._eg.c.features, context)
 
-        self._model.set_scores(
-            scores,
-            self._model.weights.c_map,
-            self._eg.c.features,
-            nr_feat
-        )
-
-    cdef int update(self, atom_t* context, class_t guess, class_t gold, int cost) except -1:
-        cdef int n_feats
-        if cost == 0:
-            self._model.update({})
-        else:
-            feats = self._extractor.get_feats(context, &n_feats)
-            counts = {gold: {}, guess: {}}
-            count_feats(counts[gold], feats, n_feats, cost)
-            count_feats(counts[guess], feats, n_feats, -cost)
-            self._model.update(counts)
+        self._model.set_scores(scores, self._eg.c.features, nr_feat)
 
     def end_training(self, model_loc=None):
         if model_loc is None:

spacy/syntax/parser.pyx

@@ -40,7 +40,7 @@ from ._parse_features cimport CONTEXT_SIZE
 from ._parse_features cimport fill_context
 from .stateclass cimport StateClass
 
-from .._ml cimport arg_max_if_true
+from thinc.learner cimport arg_max_if_true
 
 
 DEBUG = False

spacy/tagger.pxd

@@ -7,6 +7,3 @@ cdef class Tagger:
     cdef readonly Vocab vocab
     cdef readonly Model model
     cdef public dict freqs
-
-    cdef int predict(self, int i, const TokenC* tokens) except -1
-    cdef int update(self, int i, const TokenC* tokens, int gold) except -1

spacy/tagger.pyx

@@ -3,6 +3,8 @@ from os import path
 from collections import defaultdict
 
 from thinc.typedefs cimport atom_t, weight_t
+from thinc.learner cimport arg_max, arg_max_if_true, arg_max_if_zero
+from thinc.api cimport Example
 
 from .typedefs cimport attr_t
 from .tokens.doc cimport Doc
@@ -11,7 +13,6 @@ from .parts_of_speech cimport NO_TAG, ADJ, ADV, ADP, CONJ, DET, NOUN, NUM, PRON
 from .parts_of_speech cimport VERB, X, PUNCT, EOL, SPACE
 
 from .attrs cimport *
-from ._ml cimport arg_max
 
  
 cpdef enum:
@@ -138,12 +139,15 @@ cdef class Tagger:
         """
         if tokens.length == 0:
             return 0
+
+        cdef Example eg = self.model._eg
         cdef int i
-        cdef const weight_t* scores
         for i in range(tokens.length):
             if tokens.c[i].pos == 0:
-                guess = self.predict(i, tokens.c)
-                self.vocab.morphology.assign_tag(&tokens.c[i], guess)
+                eg.wipe()
+                fill_atoms(eg.c.atoms, tokens.c, i)
+                self.model(eg)
+                self.vocab.morphology.assign_tag(&tokens.c[i], eg.c.guess)
 
         tokens.is_tagged = True
         tokens._py_tokens = [None] * tokens.length
@@ -169,38 +173,25 @@ cdef class Tagger:
             raise ValueError(
                 [g for g in gold_tag_strs if g is not None and g not in self.tag_names])
         correct = 0
+        cdef Example eg = self.model._eg
         for i in range(tokens.length):
-            guess = self.update(i, tokens.c, golds[i])
-            loss = golds[i] != -1 and guess != golds[i]
+            eg.wipe()
+            fill_atoms(eg.c.atoms, tokens.c, i)
+            self.train(eg)
 
-            self.vocab.morphology.assign_tag(&tokens.c[i], guess)
+            self.vocab.morphology.assign_tag(&tokens.c[i], eg.c.guess)
             
-            correct += loss == 0
+            correct += eg.c.cost == 0
             self.freqs[TAG][tokens.c[i].tag] += 1
         return correct
 
-    cdef int predict(self, int i, const TokenC* tokens) 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)
-        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_atoms(atom_t* atoms, const TokenC* tokens, int i) nogil:
+    _fill_from_token(&atoms[P2_orth], &tokens[i-2])
+    _fill_from_token(&atoms[P1_orth], &tokens[i-1])
+    _fill_from_token(&atoms[W_orth], &tokens[i])
+    _fill_from_token(&atoms[N1_orth], &tokens[i+1])
+    _fill_from_token(&atoms[N2_orth], &tokens[i+2])
     
 
 cdef inline void _fill_from_token(atom_t* context, const TokenC* t) nogil: