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💫 Fix class mismap on parser deserializing (closes #3433) (#3470) 

v2.1 introduced a regression when deserializing the parser after
parser.add_label() had been called. The code around the class mapping is
pretty confusing currently, as it was written to accommodate backwards
model compatibility. It needs to be revised when the models are next
retrained.

Closes #3433
This commit is contained in:
Matthew Honnibal 2019-03-23 13:46:25 +01:00 committed by GitHub
parent 444a3abfe5
commit d9a07a7f6e
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2 changed files with 6 additions and 20 deletions
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9
spacy/syntax/nn_parser.pyx
View File

@ -574,11 +574,12 @@ cdef class Parser:
cfg.setdefault('min_action_freq', 30)
actions = self.moves.get_actions(gold_parses=get_gold_tuples(),
min_freq=cfg.get('min_action_freq', 30))
previous_labels = dict(self.moves.labels)
for action, labels in self.moves.labels.items():
actions.setdefault(action, {})
for label, freq in labels.items():
if label not in actions[action]:
actions[action][label] = freq
self.moves.initialize_actions(actions)
for action, label_freqs in previous_labels.items():
for label in label_freqs:
self.moves.add_action(action, label)
cfg.setdefault('token_vector_width', 96)
if self.model is True:
self.model, cfg = self.Model(self.moves.n_moves, **cfg)

17
spacy/tests/parser/test_add_label.py
View File

@ -33,7 +33,7 @@ def _train_parser(parser):
parser.begin_training([], **parser.cfg)
sgd = Adam(NumpyOps(), 0.001)
for i in range(10):
for i in range(5):
losses = {}
doc = Doc(parser.vocab, words=["a", "b", "c", "d"])
gold = GoldParse(doc, heads=[1, 1, 3, 3], deps=["left", "ROOT", "left", "ROOT"])
@ -43,21 +43,7 @@ def _train_parser(parser):
def test_add_label(parser):
parser = _train_parser(parser)
doc = Doc(parser.vocab, words=["a", "b", "c", "d"])
doc = parser(doc)
assert doc[0].head.i == 1
assert doc[0].dep_ == "left"
assert doc[1].head.i == 1
assert doc[2].head.i == 3
assert doc[2].head.i == 3
parser.add_label("right")
doc = Doc(parser.vocab, words=["a", "b", "c", "d"])
doc = parser(doc)
assert doc[0].head.i == 1
assert doc[0].dep_ == "left"
assert doc[1].head.i == 1
assert doc[2].head.i == 3
assert doc[2].head.i == 3
sgd = Adam(NumpyOps(), 0.001)
for i in range(10):
losses = {}
@ -72,7 +58,6 @@ def test_add_label(parser):
assert doc[2].dep_ == "left"
@pytest.mark.xfail
def test_add_label_deserializes_correctly():
ner1 = EntityRecognizer(Vocab())
ner1.add_label("C")