A module providing arithmetic coding to compress/decompress files.
This archive contains a python package that includes a class implementing arithmetic coding and decoding. This implementation is not intended to be the best, fastest, smallest, or any other performance related adjective.
More information on Arithmetic encoding may be found at: http://michael.dipperstein.com/arithmetic http://www.datacompression.info/ArithmeticCoding.shtml
ArithmeticCode is licensed under the GNU General Public License v3. See COPYING for full license text.
__init__.py - Python package initializtion code for bitfile. arcode.py - File containing a Class implementing the arithmetic encoding and decoding algorithms. COPYING - GNU General Public License v3 README - Package documentation sample.py - Sample usage. setup.py - distutils setup file.
Install the BitFile package prior to installing this package.
This package uses distutils. The package may be installed with the following command:
python setup.py install
arcode.py is fully documented with docstrings. Use your favorite tool for generating documentation from docstrings.
arcode.py also contains a simple unit test, which may be performed when the package is executed with the following command: python arcode.py
sample.py demonstrates usage of the ArithmaticCode methods for encoding and decoding files.
The following commands will encode a file: import arcode:
ar = arcode.ArithmeticCode(use_static_model) ar.encode_file(input_file, output_file)
Where input_file and output_file are the names of the file to be encoded and file that will contain the results of the encoding.
The following commands will decode a file: import arcode:
ar = arcode.ArithmeticCode(use_static_model) ar.decode_file(input_file, output_file)
Where input_file and output_file are the names of the file to be decoded and file that will contain the results of the decoding.
- Add/Verify support for Python 3.x.
- Add/Verify support for file-like objects.
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