summaryrefslogtreecommitdiff
path: root/python/pkg
diff options
context:
space:
mode:
Diffstat (limited to 'python/pkg')
-rw-r--r--python/pkg/cdec/sa/extract.py6
-rw-r--r--python/pkg/cdec/sa/extractor.py15
-rw-r--r--python/pkg/cdec/sa/features.py61
3 files changed, 68 insertions, 14 deletions
diff --git a/python/pkg/cdec/sa/extract.py b/python/pkg/cdec/sa/extract.py
index 9fc37345..20eab9dd 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 +53,7 @@ def extract(inp):
# Add training instance _after_ extracting grammars
if online:
extractor.add_instance(sentence, reference, alignment)
- extractor.dump_online_stats()
+ #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..5ef8041c 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 = []
+ #extended_features.append(IsSupportedOnline)
+ 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'])
diff --git a/python/pkg/cdec/sa/features.py b/python/pkg/cdec/sa/features.py
index a4ae23e8..cede5304 100644
--- a/python/pkg/cdec/sa/features.py
+++ b/python/pkg/cdec/sa/features.py
@@ -4,20 +4,39 @@ import math
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.fcount
+ 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.fcount)
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.fcount)
+ return -math.log10(prob)
def MaxLexEgivenF(ttable):
def MaxLexEgivenF(ctx):
@@ -42,16 +61,42 @@ def MaxLexFgivenE(ttable):
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):
+ if ctx.online:
+ return (ctx.online.fcount > 0.01)
+ else:
+ return False \ No newline at end of file