# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import itertools
import os
import csv
from collections import defaultdict
from six.moves import zip
import io
import wget
import sys
from subprocess import check_call, check_output
# scripts and data locations
CWD = os.getcwd()
UTILS = f"{CWD}/utils"
MOSES = f"{UTILS}/mosesdecoder"
WORKDIR_ROOT = os.environ.get('WORKDIR_ROOT', None)
if WORKDIR_ROOT is None or not WORKDIR_ROOT.strip():
print('please specify your working directory root in OS environment variable WORKDIR_ROOT. Exitting..."')
sys.exit(-1)
# please donwload mosesdecoder here:
detok_cmd = f'{MOSES}/scripts/tokenizer/detokenizer.perl'
def call(cmd):
print(f"Executing: {cmd}")
check_call(cmd, shell=True)
class MultiLingualAlignedCorpusReader(object):
"""A class to read TED talk dataset
"""
def __init__(self, corpus_path, delimiter='\t',
target_token=True, bilingual=True, corpus_type='file',
lang_dict={'source': ['fr'], 'target': ['en']},
eval_lang_dict=None, zero_shot=False,
detok=True,
):
self.empty_line_flag = 'NULL'
self.corpus_path = corpus_path
self.delimiter = delimiter
self.bilingual = bilingual
self.lang_dict = lang_dict
self.lang_set = set()
self.target_token = target_token
self.zero_shot = zero_shot
self.eval_lang_dict = eval_lang_dict
self.corpus_type = corpus_type
self.detok = detok
for list_ in self.lang_dict.values():
for lang in list_:
self.lang_set.add(lang)
self.data = dict()
self.data['train'] = self.read_aligned_corpus(split_type='train')
self.data['test'] = self.read_aligned_corpus(split_type='test')
self.data['dev'] = self.read_aligned_corpus(split_type='dev')
def read_data(self, file_loc_):
data_list = list()
with io.open(file_loc_, 'r', encoding='utf8') as fp:
for line in fp:
try:
text = line.strip()
except IndexError:
text = self.empty_line_flag
data_list.append(text)
return data_list
def filter_text(self, dict_):
if self.target_token:
field_index = 1
else:
field_index = 0
data_dict = defaultdict(list)
list1 = dict_['source']
list2 = dict_['target']
for sent1, sent2 in zip(list1, list2):
try:
src_sent = ' '.join(sent1.split()[field_index: ])
except IndexError:
src_sent = 'NULL'
if src_sent.find(self.empty_line_flag) != -1 or len(src_sent) == 0:
continue
elif sent2.find(self.empty_line_flag) != -1 or len(sent2) == 0:
continue
else:
data_dict['source'].append(sent1)
data_dict['target'].append(sent2)
return data_dict
def read_file(self, split_type, data_type):
return self.data[split_type][data_type]
def save_file(self, path_, split_type, data_type, lang):
tok_file = tok_file_name(path_, lang)
with io.open(tok_file, 'w', encoding='utf8') as fp:
for line in self.data[split_type][data_type]:
fp.write(line + '\n')
if self.detok:
de_tok(tok_file, lang)
def add_target_token(self, list_, lang_id):
new_list = list()
token = '__' + lang_id + '__'
for sent in list_:
new_list.append(token + ' ' + sent)
return new_list
def read_from_single_file(self, path_, s_lang, t_lang):
data_dict = defaultdict(list)
with io.open(path_, 'r', encoding='utf8') as fp:
reader = csv.DictReader(fp, delimiter='\t', quoting=csv.QUOTE_NONE)
for row in reader:
data_dict['source'].append(row[s_lang])
data_dict['target'].append(row[t_lang])
if self.target_token:
text = self.add_target_token(data_dict['source'], t_lang)
data_dict['source'] = text
return data_dict['source'], data_dict['target']
def read_aligned_corpus(self, split_type='train'):
data_dict = defaultdict(list)
iterable = []
s_list = []
t_list = []
if self.zero_shot:
if split_type == "train":
iterable = zip(self.lang_dict['source'], self.lang_dict['target'])
else:
iterable = zip(self.eval_lang_dict['source'], self.eval_lang_dict['target'])
elif self.bilingual:
iterable = itertools.product(self.lang_dict['source'], self.lang_dict['target'])
for s_lang, t_lang in iterable:
if s_lang == t_lang:
continue
if self.corpus_type == 'file':
split_type_file_path = os.path.join(self.corpus_path,
"all_talks_{}.tsv".format(split_type))
s_list, t_list = self.read_from_single_file(split_type_file_path,
s_lang=s_lang,
t_lang=t_lang)
data_dict['source'] += s_list
data_dict['target'] += t_list
new_data_dict = self.filter_text(data_dict)
return new_data_dict
def read_langs(corpus_path):
split_type_file_path = os.path.join(corpus_path, 'extracted',
"all_talks_dev.tsv")
with io.open(split_type_file_path, 'r', encoding='utf8') as fp:
reader = csv.DictReader(fp, delimiter='\t', quoting=csv.QUOTE_NONE)
header = next(reader)
return [k for k in header.keys() if k != 'talk_name']
def extra_english(corpus_path, split):
split_type_file_path = os.path.join(corpus_path,
f"all_talks_{split}.tsv")
output_split_type_file_path = os.path.join(corpus_path,
f"all_talks_{split}.en")
with io.open(split_type_file_path, 'r', encoding='utf8') as fp, io.open(output_split_type_file_path, 'w', encoding='utf8') as fw:
reader = csv.DictReader(fp, delimiter='\t', quoting=csv.QUOTE_NONE)
for row in reader:
line = row['en']
fw.write(line + '\n')
de_tok(output_split_type_file_path, 'en')
def tok_file_name(filename, lang):
seps = filename.split('.')
seps.insert(-1, 'tok')
tok_file = '.'.join(seps)
return tok_file
def de_tok(tok_file, lang):
# seps = tok_file.split('.')
# seps.insert(-1, 'detok')
# de_tok_file = '.'.join(seps)
de_tok_file = tok_file.replace('.tok.', '.')
cmd = 'perl {detok_cmd} -l {lang} < {tok_file} > {de_tok_file}'.format(
detok_cmd=detok_cmd, tok_file=tok_file,
de_tok_file=de_tok_file, lang=lang[:2])
call(cmd)
def extra_bitex(
ted_data_path,
lsrc_lang,
ltrg_lang,
target_token,
output_data_path,
):
def get_ted_lang(lang):
long_langs = ['pt-br', 'zh-cn', 'zh-tw', 'fr-ca']
if lang[:5] in long_langs:
return lang[:5]
elif lang[:4] =='calv':
return lang[:5]
elif lang in ['pt_BR', 'zh_CN', 'zh_TW', 'fr_CA']:
return lang.lower().replace('_', '-')
return lang[:2]
src_lang = get_ted_lang(lsrc_lang)
trg_lang = get_ted_lang(ltrg_lang)
train_lang_dict={'source': [src_lang], 'target': [trg_lang]}
eval_lang_dict = {'source': [src_lang], 'target': [trg_lang]}
obj = MultiLingualAlignedCorpusReader(corpus_path=ted_data_path,
lang_dict=train_lang_dict,
target_token=target_token,
corpus_type='file',
eval_lang_dict=eval_lang_dict,
zero_shot=False,
bilingual=True)
os.makedirs(output_data_path, exist_ok=True)
lsrc_lang = lsrc_lang.replace('-', '_')
ltrg_lang = ltrg_lang.replace('-', '_')
obj.save_file(output_data_path + f"/train.{lsrc_lang}-{ltrg_lang}.{lsrc_lang}",
split_type='train', data_type='source', lang=src_lang)
obj.save_file(output_data_path + f"/train.{lsrc_lang}-{ltrg_lang}.{ltrg_lang}",
split_type='train', data_type='target', lang=trg_lang)
obj.save_file(output_data_path + f"/test.{lsrc_lang}-{ltrg_lang}.{lsrc_lang}",
split_type='test', data_type='source', lang=src_lang)
obj.save_file(output_data_path + f"/test.{lsrc_lang}-{ltrg_lang}.{ltrg_lang}",
split_type='test', data_type='target', lang=trg_lang)
obj.save_file(output_data_path + f"/valid.{lsrc_lang}-{ltrg_lang}.{lsrc_lang}",
split_type='dev', data_type='source', lang=src_lang)
obj.save_file(output_data_path + f"/valid.{lsrc_lang}-{ltrg_lang}.{ltrg_lang}",
split_type='dev', data_type='target', lang=trg_lang)
def bar_custom(current, total, width=80):
print("Downloading: %d%% [%d / %d] Ks" % (current / total * 100, current / 1000, total / 1000), end='\r')
def download_and_extract(download_to, extract_to):
url = 'http://phontron.com/data/ted_talks.tar.gz'
filename = f"{download_to}/ted_talks.tar.gz"
if os.path.exists(filename):
print(f'{filename} has already been downloaded so skip')
else:
filename = wget.download(url, filename, bar=bar_custom)
if os.path.exists(f'{extract_to}/all_talks_train.tsv'):
print(f'Already extracted so skip')
else:
extract_cmd = f'tar xzfv "{filename}" -C "{extract_to}"'
call(extract_cmd)
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--ted_data_path', type=str, default=WORKDIR_ROOT, required=False)
parser.add_argument(
'--direction-list',
type=str,
# default=None,
#for ML50
default=(
"bn_IN-en_XX,he_IL-en_XX,fa_IR-en_XX,id_ID-en_XX,sv_SE-en_XX,pt_XX-en_XX,ka_GE-en_XX,ka_GE-en_XX,th_TH-en_XX,"
"mr_IN-en_XX,hr_HR-en_XX,uk_UA-en_XX,az_AZ-en_XX,mk_MK-en_XX,gl_ES-en_XX,sl_SI-en_XX,mn_MN-en_XX,"
#non-english directions
# "fr_XX-de_DE," # replaced with wmt20
# "ja_XX-ko_KR,es_XX-pt_XX,ru_RU-sv_SE,hi_IN-bn_IN,id_ID-ar_AR,cs_CZ-pl_PL,ar_AR-tr_TR"
),
required=False)
parser.add_argument('--target-token', action='store_true', default=False)
parser.add_argument('--extract-all-english', action='store_true', default=False)
args = parser.parse_args()
import sys
import json
# TED Talks data directory
ted_data_path = args.ted_data_path
download_to = f'{ted_data_path}/downloads'
extract_to = f'{ted_data_path}/extracted'
#DESTDIR=${WORKDIR_ROOT}/ML50/raw/
output_path = f'{ted_data_path}/ML50/raw'
os.makedirs(download_to, exist_ok=True)
os.makedirs(extract_to, exist_ok=True)
os.makedirs(output_path, exist_ok=True)
download_and_extract(download_to, extract_to)
if args.extract_all_english:
for split in ['train', 'dev', 'test']:
extra_english(ted_data_path, split)
exit(0)
if args.direction_list is not None:
directions = args.direction_list.strip().split(',')
directions = [tuple(d.strip().split('-', 1)) for d in directions if d]
else:
langs = read_langs(ted_data_path)
# directions = [
# '{}.{}'.format(src, tgt)
# for src in langs
# for tgt in langs
# if src < tgt
# ]
directions = [('en', tgt) for tgt in langs if tgt != 'en']
print(f'num directions={len(directions)}: {directions}')
for src_lang, trg_lang in directions:
print('--working on {}-{}'.format(src_lang, trg_lang))
extra_bitex(
extract_to,
src_lang,
trg_lang,
target_token=args.target_token,
output_data_path=output_path
)