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-rw-r--r--python/pkg/cdec/sa/__init__.py2
-rw-r--r--python/pkg/cdec/sa/extract.py5
-rw-r--r--python/pkg/cdec/sa/extractor.py19
-rw-r--r--python/pkg/cdec/sa/features.py117
4 files changed, 119 insertions, 24 deletions
diff --git a/python/pkg/cdec/sa/__init__.py b/python/pkg/cdec/sa/__init__.py
index 418531d9..14ba5ecb 100644
--- a/python/pkg/cdec/sa/__init__.py
+++ b/python/pkg/cdec/sa/__init__.py
@@ -1,5 +1,5 @@
from cdec.sa._sa import make_lattice, decode_lattice, decode_sentence,\
- encode_words, decode_words,\
+ encode_words, decode_words, isvar,\
SuffixArray, DataArray, LCP, Precomputation, Alignment, BiLex,\
HieroCachingRuleFactory, Sampler, Scorer
from cdec.sa.extractor import GrammarExtractor
diff --git a/python/pkg/cdec/sa/extract.py b/python/pkg/cdec/sa/extract.py
index 9fc37345..2e596bd3 100644
--- a/python/pkg/cdec/sa/extract.py
+++ b/python/pkg/cdec/sa/extract.py
@@ -12,10 +12,10 @@ extractor, prefix = None, None
online = False
def make_extractor(config, grammars, features):
- global extractor, prefix
+ global extractor, prefix, online
signal.signal(signal.SIGINT, signal.SIG_IGN) # Let parent process catch Ctrl+C
load_features(features)
- extractor = cdec.sa.GrammarExtractor(config)
+ extractor = cdec.sa.GrammarExtractor(config, online)
prefix = grammars
def load_features(features):
@@ -53,7 +53,6 @@ def extract(inp):
# Add training instance _after_ extracting grammars
if online:
extractor.add_instance(sentence, reference, alignment)
- extractor.dump_online_stats()
grammar_file = os.path.abspath(grammar_file)
return '<seg grammar="{0}" id="{1}"> {2} </seg>{3}'.format(grammar_file, i, sentence, suffix)
diff --git a/python/pkg/cdec/sa/extractor.py b/python/pkg/cdec/sa/extractor.py
index 62a251a7..acc13cbc 100644
--- a/python/pkg/cdec/sa/extractor.py
+++ b/python/pkg/cdec/sa/extractor.py
@@ -2,14 +2,15 @@ from itertools import chain
import os, sys
import cdec.configobj
from cdec.sa.features import EgivenFCoherent, SampleCountF, CountEF,\
- MaxLexEgivenF, MaxLexFgivenE, IsSingletonF, IsSingletonFE
+ MaxLexEgivenF, MaxLexFgivenE, IsSingletonF, IsSingletonFE,\
+ IsSupportedOnline
import cdec.sa
# maximum span of a grammar rule in TEST DATA
MAX_INITIAL_SIZE = 15
class GrammarExtractor:
- def __init__(self, config, features=None):
+ def __init__(self, config, online=False, features=None):
if isinstance(config, basestring):
if not os.path.exists(config):
raise IOError('cannot read configuration from {0}'.format(config))
@@ -57,11 +58,19 @@ class GrammarExtractor:
# lexical weighting tables
tt = cdec.sa.BiLex(from_binary=config['lex_file'])
+ # TODO: clean this up
+ extended_features = []
+ if online:
+ extended_features.append(IsSupportedOnline)
+
# TODO: use @cdec.sa.features decorator for standard features too
# + add a mask to disable features
+ for f in cdec.sa._SA_FEATURES:
+ extended_features.append(f)
+
scorer = cdec.sa.Scorer(EgivenFCoherent, SampleCountF, CountEF,
MaxLexFgivenE(tt), MaxLexEgivenF(tt), IsSingletonF, IsSingletonFE,
- *cdec.sa._SA_FEATURES)
+ *extended_features)
fsarray = cdec.sa.SuffixArray(from_binary=config['f_sa_file'])
edarray = cdec.sa.DataArray(from_binary=config['e_file'])
@@ -92,4 +101,6 @@ class GrammarExtractor:
# Debugging
def dump_online_stats(self):
- self.factory.dump_online_stats() \ No newline at end of file
+ self.factory.dump_online_stats()
+ def dump_online_rules(self):
+ self.factory.dump_online_rules() \ No newline at end of file
diff --git a/python/pkg/cdec/sa/features.py b/python/pkg/cdec/sa/features.py
index a4ae23e8..46412cd5 100644
--- a/python/pkg/cdec/sa/features.py
+++ b/python/pkg/cdec/sa/features.py
@@ -1,57 +1,142 @@
from __future__ import division
import math
+from cdec.sa import isvar
+
MAXSCORE = 99
def EgivenF(ctx): # p(e|f) = c(e, f)/c(f)
- return -math.log10(ctx.paircount/ctx.fcount)
+ if not ctx.online:
+ prob = ctx.paircount/ctx.fcount
+ else:
+ prob = (ctx.paircount + ctx.online.paircount) / (ctx.fcount + ctx.online.fcount)
+ return -math.log10(prob)
def CountEF(ctx): # c(e, f)
- return math.log10(1 + ctx.paircount)
+ if not ctx.online:
+ count = 1 + ctx.paircount
+ else:
+ count = 1 + ctx.paircount + ctx.online.paircount
+ return math.log10(count)
def SampleCountF(ctx): # sample c(f)
- return math.log10(1 + ctx.fsample_count)
+ if not ctx.online:
+ count = 1 + ctx.fsample_count
+ else:
+ count = 1 + ctx.fsample_count + ctx.online.fsample_count
+ return math.log10(count)
def EgivenFCoherent(ctx): # c(e, f) / sample c(f)
- prob = ctx.paircount/ctx.fsample_count
+ if not ctx.online:
+ prob = ctx.paircount/ctx.fsample_count
+ else:
+ prob = (ctx.paircount + ctx.online.paircount) / (ctx.fsample_count + ctx.online.fsample_count)
return -math.log10(prob) if prob > 0 else MAXSCORE
def CoherenceProb(ctx): # c(f) / sample c(f)
- return -math.log10(ctx.fcount/ctx.fsample_count)
+ if not ctx.online:
+ prob = ctx.fcount/ctx.fsample_count
+ else:
+ prob = (ctx.fcount + ctx.online.fcount) / (ctx.fsample_count + ctx.online.fsample_count)
+ return -math.log10(prob)
def MaxLexEgivenF(ttable):
def MaxLexEgivenF(ctx):
fwords = ctx.fphrase.words
fwords.append('NULL')
- def score():
+ # Always use this for now
+ if not ctx.online or ctx.online:
+ maxOffScore = 0.0
+ for e in ctx.ephrase.words:
+ maxScore = max(ttable.get_score(f, e, 0) for f in fwords)
+ maxOffScore += -math.log10(maxScore) if maxScore > 0 else MAXSCORE
+ return maxOffScore
+ else:
+ # For now, straight average
+ maxOffScore = 0.0
+ maxOnScore = 0.0
for e in ctx.ephrase.words:
- maxScore = max(ttable.get_score(f, e, 0) for f in fwords)
- yield -math.log10(maxScore) if maxScore > 0 else MAXSCORE
- return sum(score())
+ maxScore = max(ttable.get_score(f, e, 0) for f in fwords)
+ maxOffScore += -math.log10(maxScore) if maxScore > 0 else MAXSCORE
+ for e in ctx.ephrase:
+ if not isvar(e):
+ maxScore = 0.0
+ for f in ctx.fphrase:
+ if not isvar(f):
+ b_f = ctx.online.bilex_f.get(f, 0)
+ if b_f:
+ maxScore = max(maxScore, ctx.online.bilex_fe.get(f, {}).get(e))
+ maxOnScore += -math.log10(maxScore) if maxScore > 0 else MAXSCORE
+ return (maxOffScore + maxOnScore) / 2
return MaxLexEgivenF
def MaxLexFgivenE(ttable):
def MaxLexFgivenE(ctx):
ewords = ctx.ephrase.words
ewords.append('NULL')
- def score():
+ # Always use this for now
+ if not ctx.online or ctx.online:
+ maxOffScore = 0.0
for f in ctx.fphrase.words:
- maxScore = max(ttable.get_score(f, e, 1) for e in ewords)
- yield -math.log10(maxScore) if maxScore > 0 else MAXSCORE
- return sum(score())
+ maxScore = max(ttable.get_score(f, e, 1) for e in ewords)
+ maxOffScore += -math.log10(maxScore) if maxScore > 0 else MAXSCORE
+ return maxOffScore
+ else:
+ # For now, straight average
+ maxOffScore = 0.0
+ maxOnScore = 0.0
+ for f in ctx.fphrase.words:
+ maxScore = max(ttable.get_score(f, e, 1) for e in ewords)
+ maxOffScore += -math.log10(maxScore) if maxScore > 0 else MAXSCORE
+ for f in ctx.fphrase:
+ if not isvar(f):
+ maxScore = 0.0
+ for e in ctx.ephrase:
+ if not isvar(e):
+ b_e = ctx.online.bilex_e.get(e, 0)
+ if b_e:
+ maxScore = max(maxScore, ctx.online.bilex_fe.get(f, {}).get(e, 0) / b_e )
+ maxOnScore += -math.log10(maxScore) if maxScore > 0 else MAXSCORE
+ return (maxOffScore + maxOnScore) / 2
return MaxLexFgivenE
def IsSingletonF(ctx):
- return (ctx.fcount == 1)
+ if not ctx.online:
+ count = ctx.fcount
+ else:
+ count = ctx.fcount + ctx.online.fcount
+ return (count == 1)
def IsSingletonFE(ctx):
- return (ctx.paircount == 1)
+ if not ctx.online:
+ count = ctx.paircount
+ else:
+ count = ctx.paircount + ctx.online.paircount
+ return (count == 1)
def IsNotSingletonF(ctx):
- return (ctx.fcount > 1)
+ if not ctx.online:
+ count = ctx.fcount
+ else:
+ count = ctx.fcount + ctx.online.fcount
+ return (count > 1)
def IsNotSingletonFE(ctx):
+ if not ctx.online:
+ count = ctx.paircount
+ else:
+ count = ctx.paircount + ctx.online.paircount
return (ctx.paircount > 1)
def IsFEGreaterThanZero(ctx):
+ if not ctx.online:
+ count = ctx.paircount
+ else:
+ count = ctx.paircount + ctx.online.paircount
return (ctx.paircount > 0.01)
+
+def IsSupportedOnline(ctx): # Occurs in online data?
+ if ctx.online:
+ return (ctx.online.paircount > 0.01)
+ else:
+ return False \ No newline at end of file
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-25 20:17:09 +0000