# Copyright 2022 Cerebras Systems.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Split input src/tgt file into multiple files.
Number of examples per file is controlled by `buffer_len` param.
"""
import argparse
import os
from tqdm import tqdm
[docs]def main():
parser = argparse.ArgumentParser(
formatter_class=argparse.ArgumentDefaultsHelpFormatter
)
parser.add_argument(
"--src_file",
type=str,
required=True,
help="Path to the original source language dataset stored as one file.",
)
parser.add_argument(
"--tgt_file",
type=str,
required=True,
help="Path to the translated target language dataset stored as one file.",
)
parser.add_argument(
"--src_dir",
type=str,
required=True,
help="Path to output directory with source language dataset files.",
)
parser.add_argument(
"--tgt_dir",
type=str,
required=True,
help="Path to output directory with target language dataset files.",
)
parser.add_argument(
"--buffer_len",
type=int,
required=True,
default=17581, # in order to have 256 output files.
help="Number of examples to store in one file.",
)
args = parser.parse_args()
src_postfix = args.src_file.split("/")[-1]
tgt_postfix = args.tgt_file.split("/")[-1]
if not os.path.isdir(args.src_dir):
os.mkdir(args.src_dir)
if not os.path.isdir(args.tgt_dir):
os.mkdir(args.tgt_dir)
with open(args.src_file, "r") as src_fin:
with open(args.tgt_file, "r") as tgt_fin:
src_lines = src_fin.readlines()[::-1]
tgt_lines = tgt_fin.readlines()[::-1]
count = 0
while src_lines and tgt_lines:
result = []
while len(result) < args.buffer_len and src_lines:
result.append((src_lines.pop(), tgt_lines.pop()))
with open(
f"{args.src_dir}/{src_postfix}-{count}", "w"
) as src_fout:
with open(
f"{args.tgt_dir}/{tgt_postfix}-{count}", "w"
) as tgt_fout:
for i, line in tqdm(
enumerate(result), total=len(result)
):
src_fout.write(line[0])
tgt_fout.write(line[1])
count += 1
if __name__ == "__main__":
main()