def make_extension_matrix(samp_hdfile, tdict_pkl_fname, reverse_tdict_pkl_fname):
reverse_vocab = [lemma.decode("utf-8") for lemma in samp_hdfile["vocab"]]
vocab = dict((lemma, i)
for i, lemma in enumerate(reverse_vocab))
assert len(reverse_vocab) == len(vocab)
tdict = TransDict.load(tdict_pkl_fname)
# disable POS mapping
tdict.pos_map = None
reverse_tdict = TransDict.load(reverse_tdict_pkl_fname)
reverse_tdict.pos_map = None
shape = len(vocab), len(vocab)
log.info("making extension matrix as sparse lil_matrix {0}".format(shape))
em = sp.lil_matrix(shape, dtype="int8")
for i, target_lemma in enumerate(reverse_vocab):
try:
reverse_lookup = reverse_tdict.lookup_lemma(target_lemma)
except KeyError:
# vocab term not in reverse dict
# FIXME: these terms should be removed from vocab
continue
log.debug(40 * "=")
for _, source_lempos_list in reverse_lookup:
for source_lempos in source_lempos_list:
target_lempos_list = tdict.lookup_lempos(source_lempos)[1]
for target_lempos in target_lempos_list:
# does not handle MWU, but vocab contains only atomic
# lemmas so far
ext_target_lemma = target_lempos.rsplit("/",1)[0]
try:
j = vocab[ext_target_lemma]
except:
# oov
continue
log.debug(u"{0} --> {1} --> {2}".format(
target_lemma,
source_lempos,
ext_target_lemma))
# counting occurrences does not make a a lot of sense,
# so assume boolean
em[i,j] = 1
if log.isEnabledFor(logging.DEBUG):
log.debug(u"{0} ==> {1}".format(
target_lemma,
", ".join([str((reverse_vocab[j], count)) for j, count in zip(em.rows[i], em.data[i])])))
log.info("converting to csr_matrix")
return em.tocsr()
def make_new_vocab(sample_hdfile, tdict_pkl_fname):
tdict = TransDict.load(tdict_pkl_fname)
# disable POS mapping
tdict.pos_map = None
log.info("extracting target lemmas from translation dictionary")
dict_target_lemmas = set()
for target_lempos_list in tdict._lempos_dict.itervalues():
for target_lempos in target_lempos_list:
# skip MWU
if not " " in target_lempos:
target_lemma = target_lempos.rsplit("/",1)[0]
dict_target_lemmas.add(target_lemma)
del tdict
vocab = [t.decode("utf-8") for t in sample_hdfile["vocab"]]
# select columns numbers and corresponding target lemmas
# sorting is required because order of column number is relevant
selection = [ (i, lemma)
for i, lemma in enumerate(vocab)
if lemma in dict_target_lemmas ]
columns_selector, filtered_vocab = zip(*selection)
return columns_selector, filtered_vocab
def make_new_vocab(sample_hdfile, tdict_pkl_fname):
tdict = TransDict.load(tdict_pkl_fname)
# disable POS mapping
tdict.pos_map = None
log.info("extracting target lemmas from translation dictionary")
dict_target_lemmas = set()
for target_lempos_list in tdict._lempos_dict.itervalues():
for target_lempos in target_lempos_list:
# skip MWU
if not " " in target_lempos:
target_lemma = target_lempos.rsplit("/", 1)[0]
dict_target_lemmas.add(target_lemma)
del tdict
vocab = [t.decode("utf-8") for t in sample_hdfile["vocab"][()]]
org_size = len(vocab)
log.info("orginal vocab size: {} lemmas".format(org_size))
# select columns numbers and corresponding target lemmas
# sorting is required because order of column number is relevant
selection = [(i, lemma) for i, lemma in enumerate(vocab) if lemma in dict_target_lemmas]
columns_selector, filtered_vocab = zip(*selection)
new_size = len(filtered_vocab)
log.info("filtered vocab size: {} lemmas".format(new_size))
reduction = (new_size / float(org_size)) * 100
log.info("vocab reduced to {:.2f}% of orginal size".format(reduction))
return columns_selector, filtered_vocab
def preprocess(data_set, lang_pair):
source_lang, target_lang = lang_pair.split("-")
graphs_fname = config["eval"][data_set][lang_pair]["graphs_fname"]
out_dir = os.path.dirname(graphs_fname)
if not os.path.exists(out_dir):
os.mkdir(out_dir)
# annotate
annotator = get_annotator(source_lang)
graph_list = annotator.annot_xml_file(
config["eval"][data_set][lang_pair]["src_fname"])
# lookup translations
dict_fname = TransDict.load(config["dict"][lang_pair]["pkl_fname"])
lookup = Lookup(dict_fname)
lookup(graph_list)
# score most frequent translation
freq_score = FreqScorer(config["count"]["lemma"][target_lang]["pkl_fname"])
freq_score(graph_list)
# dict upper scores
lemma_ref_fname = \
config["eval"][data_set][lang_pair]["lemma_ref_fname"]
scorer = DictUpperScorer(lemma_ref_fname)
scorer(graph_list)
# model upper scores
ambig_fname = config["sample"][lang_pair]["ambig_fname"]
filter = filter_functions(source_lang)
scorer = ModelUpperScorer(lemma_ref_fname, ambig_fname, filter)
scorer(graph_list)
# save graphs
log.info("saving preprocessed graphs to " + graphs_fname)
cPickle.dump(graph_list, open(graphs_fname, "wb"))
def prepare(lang_pair):
"""
extract input text, create annotated graphs, lookup translation
candidates, perform frequency scoring and save pickled graphs to file
"""
source_lang, target_lang = lang_pair.split("-")
# get text from input source
xml_tree = et.ElementTree(file=config["eval"]["presemt"][lang_pair]["src_fname"])
text = " ".join(seg.text.strip() for seg in xml_tree.iter("seg"))
# annotate
if source_lang == "en":
annotator = TreeTaggerEnglish()
elif source_lang == "de":
annotator = TreeTaggerGerman()
else:
raise ValueError("unknown source language: " + source_lang)
graph_list = annotator(text)
# lookup
trans_dict = TransDict.load(config["dict"][lang_pair]["pkl_fname"])
lookup = Lookup(trans_dict)
lookup(graph_list)
# frequency scoring
freq_score = FreqScorer(config["count"]["lemma"][target_lang]["pkl_fname"])
freq_score(graph_list)
# save
if not os.path.exists(PREP_DIR):
os.makedirs(PREP_DIR)
pkl_fname = join(PREP_DIR, lang_pair + "_graphs.pkl")
log.info("saving graphs to " + pkl_fname)
cPickle.dump(graph_list,
open(pkl_fname, "wb"),
protocol=cPickle.HIGHEST_PROTOCOL)
def setup_class(cls):
dict_fname = config["dict"]["en-de"]["pkl_fname"]
print "loading picked dictionary from " + dict_fname
cls.trans_dict = TransDict.load(dict_fname)
def setup_class(cls):
dict_fname = config["dict"]["en-de"]["pkl_fname"]
print "loading picked dictionary from " + dict_fname
cls.trans_dict = TransDict.load(dict_fname)
# remove the POS mapping
cls.trans_dict.pos_map = None
def make_graphs():
"""
Create annotated translations graphs with scores for random translation,
most frequent translation and approximated maximum. Also create minimal
translation dictionaries for these graphs and drawings.
"""
for lang_pair, src_fname, lemma_ref_fname in [
("en-de",
"sample_newstest2011-src.en.sgm",
"lemma_sample_newstest2011-ref.de.sgm"),
("de-en",
"sample_out_de-en.src",
"lemma_sample_out_de-en.ref") ]:
source_lang, target_lang = lang_pair.split("-")
root_fname = splitext(src_fname)[0]
# annotate
annotator = get_annotator(source_lang)
graphs = annotator.annot_xml_file(src_fname)
# lookup
dict_fname = config["dict"][lang_pair]["pkl_fname"]
trans_dict = TransDict.load(dict_fname)
lookup = LookupKeepKeys(trans_dict)
lookup(graphs)
# write pickle of minimal translation dict
min_dict = lookup.get_minimal_trans_dict()
min_dict_fname = "dict_" + root_fname + ".pkl"
dump(min_dict, open(min_dict_fname, "wb"))
# score most frequent translation
counts_fname = config["count"]["lemma"][target_lang]["pkl_fname"]
freq_score = FreqScorer(counts_fname)
freq_score(graphs)
# score random translation
counts_fname = config["count"]["lemma"][target_lang]["pkl_fname"]
rand_score = RandScorer()
rand_score(graphs)
# dict upper score
maxscore = DictUpperScorer(lemma_ref_fname)
maxscore(graphs)
# model upper scores
ambig_fname = config["sample"][lang_pair]["ambig_fname"]
filter = filter_functions(source_lang)
scorer = ModelUpperScorer(lemma_ref_fname, ambig_fname, filter)
scorer(graphs)
# draw graphs
draw = Draw()
draw(graphs, out_format="pdf",
base_score_attrs=["dup_score", "mup_score", "freq_score",
"rand_score"],
out_dir="_draw_" + lang_pair)
# save graphs
graphs_fname = "graphs_" + root_fname + ".pkl"
dump(graphs, open(graphs_fname, "wb"))
