def build_model(fmt='binary'):
print('Loading training data...')
train_paths = [
find('corpora/ace_data/ace.dev'),
find('corpora/ace_data/ace.heldout'),
find('corpora/ace_data/bbn.dev'),
find('corpora/ace_data/muc.dev')
]
train_trees = load_ace_data(train_paths, fmt)
train_data = [postag_tree(t) for t in train_trees]
print('Training...')
cp = NEChunkParser(train_data)
del train_data
print('Loading eval data...')
eval_paths = [find('corpora/ace_data/ace.eval')]
eval_trees = load_ace_data(eval_paths, fmt)
eval_data = [postag_tree(t) for t in eval_trees]
print('Evaluating...')
chunkscore = ChunkScore()
for i, correct in enumerate(eval_data):
guess = cp.parse(correct.leaves())
chunkscore.score(correct, guess)
if i < 3: cmp_chunks(correct, guess)
print(chunkscore)
outfilename = '/tmp/ne_chunker_%s.pickle' % fmt
print('Saving chunker to %s...' % outfilename)
with open(outfilename, 'wb') as outfile:
pickle.dump(cp, outfile, -1)
return cp
def build_model(fmt='binary'):
print('Loading training data...')
train_paths = [find('corpora/ace_data/ace.dev'),
find('corpora/ace_data/ace.heldout'),
find('corpora/ace_data/bbn.dev'),
find('corpora/ace_data/muc.dev')]
train_trees = load_ace_data(train_paths, fmt)
train_data = [postag_tree(t) for t in train_trees]
print('Training...')
cp = NEChunkParser(train_data)
del train_data
print('Loading eval data...')
eval_paths = [find('corpora/ace_data/ace.eval')]
eval_trees = load_ace_data(eval_paths, fmt)
eval_data = [postag_tree(t) for t in eval_trees]
print('Evaluating...')
chunkscore = ChunkScore()
for i, correct in enumerate(eval_data):
guess = cp.parse(correct.leaves())
chunkscore.score(correct, guess)
if i < 3: cmp_chunks(correct, guess)
print(chunkscore)
outfilename = '/tmp/ne_chunker_%s.pickle' % fmt
print('Saving chunker to %s...' % outfilename)
with open(outfilename, 'wb') as outfile:
pickle.dump(cp, outfile, -1)
return cp
def build_event_chunking_model():
# Assemble training data, splitting token/PoS pairs
train_corpus = []
for tree in load_training_data('parsed'):
for sentence_tree in tree:
newtree = split_tree_tokens(sentence_tree)
train_corpus.append(newtree)
# Train chunker
chunker = EventChunkParser(train_corpus)
del train_corpus
# Load evaluation data, splitting token/PoS pairs
eval_corpus = []
for tree in load_evaluation_data('parsed'):
for sentence_tree in tree:
eval_corpus.append(split_tree_tokens(sentence_tree))
# Evaluate model
print 'Evaluating...'
chunkscore = ChunkScore()
for i, correct in enumerate(eval_corpus):
guessed = chunker.parse(correct.leaves())
guessed = chunker._parse_to_tagged(guessed)
chunkscore.score(correct, guessed)
if i < 3:
cmp_chunks(correct, guessed)
print chunkscore
return chunker
def build_model(fmt="binary"):
print("Loading training data...")
train_paths = [
find("corpora/ace_data/ace.dev"),
find("corpora/ace_data/ace.heldout"),
find("corpora/ace_data/bbn.dev"),
find("corpora/ace_data/muc.dev"),
]
train_trees = load_ace_data(train_paths, fmt)
train_data = [postag_tree(t) for t in train_trees]
print("Training...")
cp = NEChunkParser(train_data)
del train_data
print("Loading eval data...")
eval_paths = [find("corpora/ace_data/ace.eval")]
eval_trees = load_ace_data(eval_paths, fmt)
eval_data = [postag_tree(t) for t in eval_trees]
print("Evaluating...")
chunkscore = ChunkScore()
for i, correct in enumerate(eval_data):
guess = cp.parse(correct.leaves())
chunkscore.score(correct, guess)
if i < 3:
cmp_chunks(correct, guess)
print(chunkscore)
outfilename = "/tmp/ne_chunker_%s.pickle" % fmt
print("Saving chunker to %s..." % outfilename)
with open(outfilename, "wb") as out:
pickle.dump(cp, out, -1)
return cp
def build_model(fmt="binary"):
print("Loading training data...")
train_paths = [
find("corpora/ace_data/ace.dev"),
find("corpora/ace_data/ace.heldout"),
find("corpora/ace_data/bbn.dev"),
find("corpora/ace_data/muc.dev"),
]
train_trees = load_ace_data(train_paths, fmt)
train_data = [postag_tree(t) for t in train_trees]
print("Training...")
cp = NEChunkParser(train_data)
del train_data
print("Loading eval data...")
eval_paths = [find("corpora/ace_data/ace.eval")]
eval_trees = load_ace_data(eval_paths, fmt)
eval_data = [postag_tree(t) for t in eval_trees]
print("Evaluating...")
chunkscore = ChunkScore()
for i, correct in enumerate(eval_data):
guess = cp.parse(correct.leaves())
chunkscore.score(correct, guess)
if i < 3:
cmp_chunks(correct, guess)
print(chunkscore)
outfilename = "/tmp/ne_chunker_{0}.pickle".format(fmt)
print("Saving chunker to {0}...".format(outfilename))
with open(outfilename, "wb") as outfile:
pickle.dump(cp, outfile, -1)
return cp
def evaluate(self, gold):
"""
Score the accuracy of the chunker against the gold standard.
Remove the chunking the gold standard text, rechunk it using
the chunker, and return a ``ChunkScore`` object
reflecting the performance of this chunk peraser.
:type gold: list(Tree)
:param gold: The list of chunked sentences to score the chunker on.
:rtype: ChunkScore
"""
chunkscore = ChunkScore()
for correct in gold:
chunkscore.score(correct, self.parse(correct.leaves()))
return chunkscore
def evaluate(self, gold):
"""
Score the accuracy of the chunker against the gold standard.
Remove the chunking the gold standard text, rechunk it using
the chunker, and return a ``ChunkScore`` object
reflecting the performance of this chunk peraser.
:type gold: list(Tree)
:param gold: The list of chunked sentences to score the chunker on.
:rtype: ChunkScore
"""
chunkscore = ChunkScore()
for correct in gold:
chunkscore.score(correct, self.parse(correct.leaves()))
return chunkscore
def compare(self, ann2, labels=None):
"""
Estimates the accuracy of annotation/prediction assuming the current
Annotation is the gold standard
:return: NLTK ChinkScore Object
"""
if labels is None:
labels = tuple(value for value in self.labels if value in ann2.labels)
self_nltk = nltk.chunk.conllstr2tree(self.to_iob()[1], chunk_types=labels)
ann2_nltk = nltk.chunk.conllstr2tree(ann2.to_iob()[1], chunk_types=labels)
chunk_score = ChunkScore()
chunk_score.score(self_nltk, ann2_nltk)
return chunk_score
def make_tree(tree):
if isinstance(tree, tuple) and len(tree) > 2:
return ImmutableTree(tree[0],
[make_tree(tree[i]) for i in range(2, len(tree))])
else:
return tree
if __name__ == "__main__":
if len(sys.argv) != 2:
print >> sys.stderr, "Usage: %s grammar.pickle" % (sys.argv[0])
exit(1)
(grammar, sentence_tags) = pickle.load(open(sys.argv[1]))
score = ChunkScore()
for (gold, s) in list(sentences())[0:10]:
print ' '.join(s)
parses = list(parse(s, grammar, sentence_tags))
if parses:
guess = make_tree(max(parses, key=operator.itemgetter(1)))
print gold
print guess
score.score(gold, guess)
print 'Accuracy:', score.accuracy()
print 'Precision:', score.precision()
print 'Recall:', score.recall()
print 'F Measure:', score.f_measure()
if s not in parse(f, grammar):
print "[ERROR] " + format(f)
def make_tree(tree):
if isinstance(tree, tuple) and len(tree) > 2:
return ImmutableTree(tree[0], [make_tree(tree[i]) for i in range(2, len(tree))])
else:
return tree
if __name__ == "__main__":
if len(sys.argv) != 2:
print >> sys.stderr, "Usage: %s grammar.pickle"%(sys.argv[0])
exit(1)
(grammar,sentence_tags) = pickle.load(open(sys.argv[1]))
score = ChunkScore()
for (gold, s) in list(sentences())[0:10]:
print ' '.join(s)
parses = list(parse(s, grammar, sentence_tags))
if parses:
guess = make_tree(max(parses, key=operator.itemgetter(1)))
print gold
print guess
score.score(gold, guess)
print 'Accuracy:', score.accuracy()
print 'Precision:', score.precision()
print 'Recall:', score.recall()
print 'F Measure:', score.f_measure()