bcj filter library
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Author: Hiroshi Miura
Requires Python: >=3.10
Classifiers
Development Status
- 5 - Production/Stable
License
- OSI Approved :: GNU Lesser General Public License v2 or later (LGPLv2+)
Operating System
- MacOS :: MacOS X
- Microsoft :: Windows
- POSIX
- POSIX :: Linux
Programming Language
- Python
- Python :: 3
- Python :: 3.10
- Python :: 3.11
- Python :: 3.12
- Python :: 3.13
- Python :: 3.14
- Python :: 3 :: Only
- Python :: Implementation :: CPython
- Python :: Implementation :: PyPy
Topic
- Software Development :: Libraries :: Python Modules
In data compression, BCJ, short for Branch-Call-Jump, refers to a technique that improves the compression of machine code of executable binaries by replacing relative branch addresses with absolute ones. This allows a LZMA compressor to identify duplicate targets and archive higher compression rate.
BCJ is used in 7-zip compression utility as default filter for executable binaries.
pybcj is a python bindings with BCJ implementation by C language. The C codes are derived from p7zip, portable 7-zip implementation. pybcj support Intel/Amd x86/x86_64, Arm/Arm64, ArmThumb, Sparc, PPC, and IA64.
Development status
A development status is considered as Beta state.
Installation
As usual, you can install pybcj using python standard pip command.
pip install pybcjAlternatively, one can also use conda:
conda install -c conda-forge pybcjWARNING
When use it on MSYS2/Mingw64 environment, please set environment variable SETUPTOOLS_USE_DISTUTILS=stdlib to install.
License
SPDX-License-Identifier: LGPL-2.1-or-later
Copyright (C) 2020-2025 Hiroshi Miura
Copyright (C) 1999-2010 Igor Pavlov
1.0.7
Nov 29, 2025
1.0.6
Apr 29, 2025
1.0.3
Dec 23, 2024
1.0.2
Nov 05, 2023
1.0.1
Aug 05, 2022
1.0.0
Aug 03, 2022
0.6.1
Jul 03, 2022
0.6.0
May 17, 2022
0.6.0b1
May 17, 2022
0.5.3
May 15, 2022
0.5.2
Apr 10, 2022
0.5.1
Mar 26, 2022
0.5.0
Oct 15, 2021
Wheel compatibility matrix
Files in release
pybcj-1.0.7-cp310-cp310-macosx_10_9_universal2.whl (31.0KiB)
pybcj-1.0.7-cp310-cp310-macosx_10_9_x86_64.whl (23.1KiB)
pybcj-1.0.7-cp310-cp310-macosx_11_0_arm64.whl (23.5KiB)
pybcj-1.0.7-cp310-cp310-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl (49.4KiB)
pybcj-1.0.7-cp310-cp310-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl (48.3KiB)
pybcj-1.0.7-cp310-cp310-musllinux_1_2_aarch64.whl (48.6KiB)
pybcj-1.0.7-cp310-cp310-musllinux_1_2_x86_64.whl (48.0KiB)
pybcj-1.0.7-cp310-cp310-win_amd64.whl (24.3KiB)
pybcj-1.0.7-cp310-cp310-win_arm64.whl (22.8KiB)
pybcj-1.0.7-cp311-cp311-macosx_10_9_universal2.whl (31.0KiB)
pybcj-1.0.7-cp311-cp311-macosx_10_9_x86_64.whl (23.1KiB)
pybcj-1.0.7-cp311-cp311-macosx_11_0_arm64.whl (23.5KiB)
pybcj-1.0.7-cp311-cp311-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl (50.5KiB)
pybcj-1.0.7-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl (49.4KiB)
pybcj-1.0.7-cp311-cp311-musllinux_1_2_aarch64.whl (48.6KiB)
pybcj-1.0.7-cp311-cp311-musllinux_1_2_x86_64.whl (48.1KiB)
pybcj-1.0.7-cp311-cp311-win_amd64.whl (24.3KiB)
pybcj-1.0.7-cp311-cp311-win_arm64.whl (22.8KiB)
pybcj-1.0.7-cp312-cp312-macosx_10_13_universal2.whl (31.1KiB)
pybcj-1.0.7-cp312-cp312-macosx_10_13_x86_64.whl (23.2KiB)
pybcj-1.0.7-cp312-cp312-macosx_11_0_arm64.whl (23.5KiB)
pybcj-1.0.7-cp312-cp312-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl (51.2KiB)
pybcj-1.0.7-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl (50.3KiB)
pybcj-1.0.7-cp312-cp312-musllinux_1_2_aarch64.whl (49.1KiB)
pybcj-1.0.7-cp312-cp312-musllinux_1_2_x86_64.whl (48.8KiB)
pybcj-1.0.7-cp312-cp312-win_amd64.whl (24.4KiB)
pybcj-1.0.7-cp312-cp312-win_arm64.whl (22.9KiB)
pybcj-1.0.7-cp313-cp313-macosx_10_13_universal2.whl (31.1KiB)
pybcj-1.0.7-cp313-cp313-macosx_10_13_x86_64.whl (23.2KiB)
pybcj-1.0.7-cp313-cp313-macosx_11_0_arm64.whl (23.5KiB)
pybcj-1.0.7-cp313-cp313-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl (51.2KiB)
pybcj-1.0.7-cp313-cp313-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl (50.3KiB)
pybcj-1.0.7-cp313-cp313-musllinux_1_2_aarch64.whl (49.2KiB)
pybcj-1.0.7-cp313-cp313-musllinux_1_2_x86_64.whl (48.9KiB)
pybcj-1.0.7-cp313-cp313-win_amd64.whl (24.4KiB)
pybcj-1.0.7-cp313-cp313-win_arm64.whl (22.9KiB)
pybcj-1.0.7-cp314-cp314-macosx_10_15_universal2.whl (31.6KiB)
pybcj-1.0.7-cp314-cp314-macosx_10_15_x86_64.whl (23.3KiB)
pybcj-1.0.7-cp314-cp314-macosx_11_0_arm64.whl (23.5KiB)
pybcj-1.0.7-cp314-cp314-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl (51.3KiB)
pybcj-1.0.7-cp314-cp314-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl (50.3KiB)
pybcj-1.0.7-cp314-cp314-musllinux_1_2_aarch64.whl (49.3KiB)
pybcj-1.0.7-cp314-cp314-musllinux_1_2_x86_64.whl (48.8KiB)
pybcj-1.0.7-cp314-cp314-win_amd64.whl (24.7KiB)
pybcj-1.0.7-cp314-cp314-win_arm64.whl (23.1KiB)
pybcj-1.0.7-cp314-cp314t-macosx_10_15_universal2.whl (32.2KiB)
pybcj-1.0.7-cp314-cp314t-macosx_10_15_x86_64.whl (23.5KiB)
pybcj-1.0.7-cp314-cp314t-macosx_11_0_arm64.whl (23.9KiB)
pybcj-1.0.7-cp314-cp314t-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl (57.4KiB)
pybcj-1.0.7-cp314-cp314t-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl (55.6KiB)
pybcj-1.0.7-cp314-cp314t-musllinux_1_2_aarch64.whl (54.7KiB)
pybcj-1.0.7-cp314-cp314t-musllinux_1_2_x86_64.whl (53.9KiB)
pybcj-1.0.7-cp314-cp314t-win_amd64.whl (25.2KiB)
pybcj-1.0.7-cp314-cp314t-win_arm64.whl (23.5KiB)
pybcj-1.0.7.tar.gz (30.5KiB)
