New submission from insomniacslk:
Tarfile would benefit from exposing custom compressors. At the moment the only
way to use something that is not gzip/bzip/lzma is to separate the archiving
and compression steps.
A possible approach is to pass a custom compression function to
`tarfile.TarFile.open`. However the current interface is not clean enough to be
exposed. I have made a very conservative change via a pull request on GitHub,
see https://github.com/python/cpython/pull/2734 . Some additional
considerations can be found there.
A further step could require a simplified interface that only involves file
name, file-like object and compression level, and returns a file-like object to
read the compressed data from. For example:
def my_compressor(name, fileobj=None, compresslevel=9):
# compression happens here
return filelike_object
This further step is not captured in the pull request, but I can iterate and
update the diff.
--
components: Library (Lib)
messages: 299017
nosy: insomniacslk
priority: normal
pull_requests: 2903
severity: normal
status: open
title: Add support for custom compressor in tarfile
type: enhancement
versions: Python 3.6, Python 3.7
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