New submission from bbayles <bbay...@gmail.com>: In [1] (issue 21417), support for setting an archive (or its files) compression level was added to the zipfile module.
That currently works for the ZIP_DEFLATED and ZIP_BZIP2 compression methods, but not for ZIP_LZMA. This is because zipfile includes its own implementation of LZMACompressor that hard-codes the default preset's parameters (see also [2]). It should be possible to extend compression level settings to ZIP_LZMA by making zipfile.LZMACompressor more flexible, i.e. able to accept an LZMA preset. I think this would involve porting the function that translates presets to options (lzma_lzma_preset, see [3]) and passing in those options to lzma.LZMACompressor . [1] https://bugs.python.org/issue21417 [2] https://github.com/python/cpython/pull/5385 [3] https://git.tukaani.org/?p=xz.git;a=blob;f=src/liblzma/lzma/lzma_encoder_presets.c;hb=HEAD ---------- components: Library (Lib) messages: 311283 nosy: bbayles priority: normal severity: normal status: open title: Extend zipfile's compression level support to LZMA type: enhancement versions: Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue32728> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
