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59 lines
1.6 KiB
59 lines
1.6 KiB
"""Build vocabulary from manifest files.
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Each item in vocabulary file is a character.
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"""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import argparse
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import functools
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import codecs
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import json
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from collections import Counter
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import os.path
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import _init_paths
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from data_utils.utility import read_manifest
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from utils.utility import add_arguments, print_arguments
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parser = argparse.ArgumentParser(description=__doc__)
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add_arg = functools.partial(add_arguments, argparser=parser)
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# yapf: disable
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add_arg('count_threshold', int, 0, "Truncation threshold for char counts.")
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add_arg('vocab_path', str,
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'data/librispeech/vocab.txt',
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"Filepath to write the vocabulary.")
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add_arg('manifest_paths', str,
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None,
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"Filepaths of manifests for building vocabulary. "
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"You can provide multiple manifest files.",
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nargs='+',
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required=True)
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# yapf: disable
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args = parser.parse_args()
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def count_manifest(counter, manifest_path):
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manifest_jsons = read_manifest(manifest_path)
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for line_json in manifest_jsons:
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for char in line_json['text']:
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counter.update(char)
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def main():
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print_arguments(args)
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counter = Counter()
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for manifest_path in args.manifest_paths:
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count_manifest(counter, manifest_path)
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count_sorted = sorted(counter.items(), key=lambda x: x[1], reverse=True)
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with codecs.open(args.vocab_path, 'w', 'utf-8') as fout:
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for char, count in count_sorted:
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if count < args.count_threshold: break
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fout.write(char + '\n')
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if __name__ == '__main__':
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main()
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