def run(self):
en_ch_sents = []
sents_index = defaultdict(set)
print('building sents index...')
with self.input()['en'].open('r') as enf, \
self.input()['ch'].open('r') as chf:
for sent_no, (en_sent, ch_sent) in enumerate(zip(enf, chf)):
en_ch_sents.append((en_sent.strip(), ch_sent.strip()))
bigrams = tools.ngrams(en_sent.strip().split(), 2)
for bigram in bigrams:
sents_index[bigram].add(sent_no)
print('finding spg sents...')
with self.input()['spg'].open('r') as spgf, \
self.output().open('w') as outputf:
for spgs_of_en_pattern_json in spgf:
spgs_of_en_pattern = json.loads(spgs_of_en_pattern_json)
for spg in spgs_of_en_pattern['ch_patterns']:
bigrams = tools.ngrams(spg['en_phrase'].split(), 2)
sents_nos_sets = (sents_index[bigram]
for bigram in bigrams)
sents_nos = reduce(lambda x, y: x & y, sents_nos_sets)
sents = (en_ch_sents[sent_no] for sent_no in sents_nos)
spg['sents'] = [(en_sent, ch_sent)
for en_sent, ch_sent in sents
if spg['en_phrase'] in en_sent and
spg['ch_phrase'] in ch_sent]
print(json.dumps(spgs_of_en_pattern,
ensure_ascii=False,
check_circular=False),
file=outputf)
def selectFeatures(data, tags, stoplist, p): # p[i] for i-gram passing high pass filter dlist = [] for r in data: r['feature'] = [] for num in range(1, len(p) + 1): # n-gram lengthes stat = Counter() for tag in tags: try: stat += ngrams(r[tag], num, stoplist) except KeyError: continue nc = csfilter(stat, p[num - 1], 0) r['feature'] += [k for k,v in nc] if not r['feature']: dlist.append(r) for r in dlist: data.remove(r)
def convert2pytables(phrasetable_path, lexe2f_path, lexf2e_path, h5_path,
reverse=False):
class PTable(tb.IsDescription):
bigram = tb.StringCol(30)
en = tb.StringCol(200)
ch = tb.StringCol(200)
aligns = tb.StringCol(100)
scores = tb.Float64Col(shape=4)
lexe2f = []
with open(lexe2f_path) as lexe2f_f:
for line in lexe2f_f:
# print(line)
en, ch_prob = line.strip().split(' ', 1)
ch, prob = ch_prob.rsplit(' ', 1)
lexe2f.append((en, ch, prob))
lexf2e = []
with open(lexf2e_path) as lexf2e_f:
for line in lexf2e_f:
ch, en, prob = line.strip().split(' ', 1)
lexf2e.append((ch, en, prob))
if reverse:
lexe2f, lexf2e = lexf2e, lexe2f
with tb.open_file(h5_path, mode='w', title='PhraseTable') as h5file, \
gzip.open(phrasetable_path, 'rt') as ptfile:
filters = tb.Filters(complevel=9, complib='blosc')
h5file.create_array('/', 'lexe2f', lexe2f, 'lex en to ch prob')
h5file.create_array('/', 'lexf2e', lexf2e, 'lex ch to en prob')
table = h5file.create_table(
'/', 'phrasetable',
description=PTable,
title='Phrase Table',
filters=filters,
# expectedrows=21626879, # chunkshape=(21626,)
)
print(h5file)
table_row = table.row
for line in ptfile:
en, ch, scores, aligns, cnt = line.strip().split(' ||| ')
if reverse: en, ch = ch, en
en, ch = en.strip(), ch.strip()
inv_phrase_prob, inv_lex_w, dir_phrase_prob, dir_lex_w, _ = map(
float, scores.strip().split())
if reverse:
inv_phrase_prob, inv_lex_w, dir_phrase_prob, dir_lex_w = dir_phrase_prob, dir_lex_w, inv_phrase_prob, inv_lex_w
aligns = (map(int, align.split('-'))
for align in aligns.strip().split())
if reverse:
aligns = ((en_pos, ch_pos) for ch_pos, en_pos in aligns)
aligns_ddict = defaultdict(list)
for en_pos, ch_pos in aligns:
aligns_ddict[en_pos].append(ch_pos)
aligns = dict(aligns_ddict)
bigrams = tools.ngrams(en.split(), 2)
en = en.strip()
for bigram in bigrams:
table_row['bigram'] = ' '.join(bigram).encode('utf8')
table_row['en'] = en.encode('utf8')
table_row['ch'] = ch.encode('utf8')
table_row['aligns'] = json.dumps(aligns).encode('utf8')
table_row['scores'] = (inv_phrase_prob, inv_lex_w,
dir_phrase_prob, dir_lex_w)
table_row.append()
table.flush()
table.cols.bigram.create_csindex(filters=filters)
