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fasttext_format_converter.py
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fasttext_format_converter.py
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"""
A format converter for use with FastText, supporting reverse format conversion as well.
Written by Ye Kyaw Thu, LU Lab., Myanmar.
Last updated: 22 Jan 2024
Usage:
python ./fasttext_format_converter.py --help
python ./fasttext_format_converter.py --input ./all_languages.txt --output ./all_languages.fasttext
python ./fasttext_format_converter.py --input ./all_languages.fasttext --output output.txt --reverse
"""
import argparse
import sys
def convert_to_fasttext_format(line, reverse=False):
if reverse:
if line.startswith('__label__'):
parts = line[len('__label__'):].split("\t")
if len(parts) != 2:
return None
return f"{parts[1].strip()}\t{parts[0].strip()}"
else:
return None # Return None if line does not start with '__label__'
else:
parts = line.split("\t")
if len(parts) != 2:
return None
return f"__label__{parts[1].strip()}\t{parts[0].strip()}"
def process_file(input_stream, output_stream, reverse=False):
for line in input_stream:
converted_line = convert_to_fasttext_format(line.strip(), reverse)
if converted_line:
output_stream.write(converted_line + '\n')
def main():
parser = argparse.ArgumentParser(description="Converts text data for FastText format.")
parser.add_argument('--input', type=str, help='Input file path. If not provided, reads from stdin.')
parser.add_argument('--output', type=str, help='Output file path. If not provided, writes to stdout.')
parser.add_argument('--reverse', action='store_true', help='Reverse conversion (from FastText format to original).')
args = parser.parse_args()
input_stream = open(args.input, 'r', encoding='utf-8') if args.input else sys.stdin
output_stream = open(args.output, 'w', encoding='utf-8') if args.output else sys.stdout
try:
process_file(input_stream, output_stream, args.reverse)
finally:
if args.input:
input_stream.close()
if args.output:
output_stream.close()
if __name__ == "__main__":
main()