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https://github.com/rspeer/wordfreq.git
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51 lines
1.7 KiB
Python
51 lines
1.7 KiB
Python
"""
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Generate a msgpack file, _chinese_mapping.msgpack.gz, that maps Traditional
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Chinese characters to their Simplified Chinese equivalents.
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This is meant to be a normalization of text, somewhat like case-folding -- not
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an actual translator, a task for which this method would be unsuitable. We
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store word frequencies using Simplified Chinese characters so that, in the
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large number of cases where a Traditional Chinese word has an obvious
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Simplified Chinese mapping, we can get a frequency for it that's the same in
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Simplified and Traditional Chinese.
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Generating this mapping requires the external Chinese conversion tool OpenCC.
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"""
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import unicodedata
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import itertools
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import os
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import msgpack
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import gzip
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def make_hanzi_table(filename):
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with open(filename, 'w', encoding='utf-8') as out:
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for codept in itertools.chain(range(0x3400, 0xa000), range(0xf900, 0xfb00), range(0x20000, 0x30000)):
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char = chr(codept)
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if unicodedata.category(char) != 'Cn':
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print('%5X\t%s' % (codept, char), file=out)
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def make_hanzi_converter(table_in, msgpack_out):
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table = {}
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with open(table_in, encoding='utf-8') as infile:
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for line in infile:
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hexcode, char = line.rstrip('\n').split('\t')
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codept = int(hexcode, 16)
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assert len(char) == 1
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if chr(codept) != char:
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table[codept] = char
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with gzip.open(msgpack_out, 'wb') as outfile:
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msgpack.dump(table, outfile, encoding='utf-8')
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def build():
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make_hanzi_table('/tmp/han_in.txt')
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os.system('opencc -c zht2zhs.ini < /tmp/han_in.txt > /tmp/han_out.txt')
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make_hanzi_converter('/tmp/han_out.txt', '_chinese_mapping.msgpack.gz')
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if __name__ == '__main__':
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build()
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