➜
This issue tracker has been migrated to GitHub,
and is currently read-only.
For more information,
see the GitHub FAQs in the Python's Developer Guide.
Created on 2016-07-04 20:01 by joshtriplett, last changed 2022-04-11 14:58 by admin.
| Messages (5) | |||
|---|---|---|---|
| msg269806 - (view) | Author: Josh Triplett (joshtriplett) | Date: 2016-07-04 20:01 | |
(This exists in both Python 3 and Python 2.) When opening an existing .bz2 file with BZ2File, I'd like to have access to the compression level, so that I don't have to manually parse the file's header to get it. BZ2File could provide the compression level as an attribute on itself. |
|||
| msg269818 - (view) | Author: R. David Murray (r.david.murray) *  |
Date: 2016-07-05 11:38 | |
New features can only be added in a new feature release, which means 3.6 at the moment (the window for that is shrinking fast, though, we hit beta in September). |
|||
| msg272756 - (view) | Author: Xiang Zhang (xiang.zhang) * |
Date: 2016-08-15 13:14 | |
If you don't want to manually parse it, the lib has to. Currently, bz2 delegates all the raw data parsing (compression/decompression) to the underlying C library. Unfortunately the bzip2 library doesn't expose the header info which means to get compression level, we have to do some raw data parsing in the lib. Actually I wonder if it's worth though this seems not hard to implement. |
|||
| msg274348 - (view) | Author: Martin Panter (martin.panter) * |
Date: 2016-09-04 07:26 | |
I guess the compression level you want is the same as the 100–900 kB block size recorded as the third byte in the header. But I don’t see this as a particularly useful feature either. Why do you want to know the compression level? |
|||
| msg274349 - (view) | Author: Josh Triplett (joshtriplett) | Date: 2016-09-04 08:33 | |
As part of a reproducible build project, to allow recompressing a file with the same compression level previously used. |
|||
| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:33 | admin | set | github: 71637 |
| 2016-09-04 08:33:02 | joshtriplett | set | messages: + msg274349 |
| 2016-09-04 07:26:19 | martin.panter | set | messages: + msg274348 |
| 2016-08-15 13:14:01 | xiang.zhang | set | nosy:
+ xiang.zhang, martin.panter messages: + msg272756 |
| 2016-07-05 11:38:43 | r.david.murray | set | versions:
- Python 2.7, Python 3.5 nosy: + r.david.murray messages: + msg269818 stage: needs patch |
| 2016-07-04 20:01:33 | joshtriplett | create | |