Monkey patch the standard zipfile module to enable accelerated deflate via isal
Project description
zipfile-isal
Monkey patch the standard zipfile
module to enable accelerated deflate support via isal.
Based on zipfile-deflate64
and zipfile-zstandard
, which provides similar functionality but for the deflate64
algorithm. Unlike zipfile-deflate64
, this package supports both compression and decompression.
Requires isal
(and slz
optionally).
Note: if you need Python2, use zipfile39 instead (it is also compatible with Python3).
Installation
pip install zipfile-isal
Usage
Anywhere in a Python codebase:
import zipfile_isal # This has the side effect of patching the zipfile module to support isal
Alternatively, zipfile_isal
re-exports the zipfile
API, as a convenience:
import zipfile_isal as zipfile
zipfile.ZipFile(...)
Compression example:
import zipfile_isal as zipfile
zf = zipfile.ZipFile('/tmp/test.zip', 'w', zipfile.ZIP_DEFLATED, compresslevel=-12)
zf.write('large_file.img')
compresslevel:
- -10, -11, -12, -13 correspond to isal 0, 1, 2, 3
- -21 corresponds to slz
- 11 to 19 correspond to 7-zip 1-9
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