Pure python 7-zip implementation

It uses a standard lzma module and its API supported. It also uses type definitions introduced in Python3.6.

Minimum required version is Python 3.5.

Version recommendations are:

• CPython 3.7.5, CPython 3.8.0 and later.
• PyPy3.6-7.2.0 and later.

Following fixes are included in above versions and python3.6 series is not fixed it.

• BPO-21872: LZMA library sometimes fails to decompress a file
• PyPy3-3088: lzma.LZMADecomporessor.decompress does not respect max_length

Here is a readthedocs manual document.

You can run command script py7zr like as follows;

$ py7zr l test.7z
$ py7zr x test.7z
$ py7zr w target.7z test_dir

py7zr is a library which can use in your pyhton application. Here is a code snippet how to decompress some file in your applicaiton.

import py7zr

archive = py7zr.SevenZipFile('sample.7z', mode='r')
archive.extractall(path="/tmp")
archive.close()

Here is a code snippet how to produce archive.

import py7zr

archvie = py7zr.SevenZipFile('target.7z', 'w')
archive.writeall('./base_dir')
archive.close()

py7zr also support shutil interface.

from py7zr import pack_7zarchvie, unpack_7zarchive
import shutil

# register file format at first.
shutil.register_archive_format('7zip', pack_7zarchive, description='7zip archive')
shutil.register_unpack_format('7zip', ['.7z'], unpack_7zarchive)

# extraction
shutil.unpack_archive('test.7z', '/tmp')

# compression
shutil.make_archive('target', '7zip', 'src')

• Copyright (C) 2019 Hiroshi Miura
• Copyright (c) 2004-2015 by Joachim Bauch
• 7-Zip Copyright (C) 1999-2010 Igor Pavlov
• LZMA SDK Copyright (C) 1999-2010 Igor Pavlov

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA