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Thank you, Nadeem Vawda. I also wrote a patch for this, but because of the lack of experience it was too cumbersome.
But there are no tests for these functions. I tried to use these functions and got the random values.
>>> lzma.decode_filter_properties(lzma.FILTER_LZMA1, lzma.encode_filter_properties({'id': lzma.FILTER_LZMA1, 'preset': 6}))
{'mode': 3075124424, 'dict_size': 8388608, 'id': 4611686018427387905, 'lp': 0, 'nice_len': 739426833, 'depth': 0, 'lc': 3, 'mf': 0, 'pb': 2}
>>> lzma.decode_filter_properties(lzma.FILTER_LZMA1, lzma.encode_filter_properties({'id': lzma.FILTER_LZMA1, 'preset': 6}))
{'mode': 0, 'dict_size': 8388608, 'id': 4611686018427387905, 'lp': 0, 'nice_len': 2053908595, 'depth': 0, 'lc': 3, 'mf': 0, 'pb': 2}
>>> lzma.decode_filter_properties(lzma.FILTER_LZMA1, lzma.encode_filter_properties({'id': lzma.FILTER_LZMA1, 'preset': 6}))
{'mode': 0, 'dict_size': 8388608, 'id': 4611686018427387905, 'lp': 0, 'nice_len': 2053908595, 'depth': 0, 'lc': 3, 'mf': 0, 'pb': 2}
It seems, 'mode' and 'nice_len' was not initialized.
Tests for zipfile module with the use of these functions are broken, and I don't know, this happens because of errors in these functions or in zipfile module.