==================================================== Announcing python-blosc 1.0.1 A Python wrapper for the Blosc compression library ====================================================
What is it? =========== Blosc (http://blosc.pytables.org) is a high performance compressor optimized for binary data. It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() OS call. Blosc works well for compressing numerical arrays that contains data with relatively low entropy, like sparse data, time series, grids with regular-spaced values, etc. This is a Python package that wraps it. What is new? ============ Everything. This is the first public version of the Python wrapper for Blosc (1.1.1). It supports Python 2.6, 2.7 and 3.1. The API is very simple and it loosely follows that of the zlib module. There are two basic functions, `compress()` and `decompress()`, as well as two additional calls specific for compressing NumPy arrays, namely `pack_array()` and `unpack_array`. There are also utilities for changing dynamically the number of threads used or to release resources when you are not going to need blosc for a while. Basic Usage =========== >>> import numpy as np >>> a = np.linspace(0, 100, 1e7) >>> bytes_array = a.tostring() >>> import blosc >>> bpacked = blosc.compress(bytes_array, typesize=8) >>> bytes_array2 = blosc.decompress(bpacked) >>> print(bytes_array == bytes_array2) True More examples are available on python-blosc wiki page: http://github.com/FrancescAlted/python-blosc/wiki Documentation ============= Please refer to docstrings. Start by the main package: >>> import blosc >>> help(blosc) and ask for more docstrings in the referenced functions. Download sources ================ Go to: http://github.com/FrancescAlted/python-blosc and download the most recent release from here. Blosc is distributed using the MIT license, see LICENSES/BLOSC.txt for details. Mailing list ============ There is an official mailing list for Blosc at: bl...@googlegroups.com http://groups.google.es/group/blosc ---- **Enjoy data!** -- Francesc Alted -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
