[Numpy-discussion] ANN: PyTables 2.2b3 released

Francesc Alted faltet@pytables....
Fri Feb 26 05:38:29 CST 2010

 Announcing PyTables 2.2b3

PyTables is a library for managing hierarchical datasets and designed to
efficiently cope with extremely large amounts of data with support for
full 64-bit file addressing.  PyTables runs on top of the HDF5 library
and NumPy package for achieving maximum throughput and convenient use.

This is the third, and most probably last, beta version of 2.2 release.
The main addition in this beta version is the addition of Blosc
(http://blosc.pytables.org), a high-speed compressor that is meant to
work at similar speeds, or higher, than the memory-cache bandwidth in
modern processors.  This will allow for very high performance in
internal, in-memory PyTables computations while still using compression.
Remember that Blosc is still in *beta* and it is not meant for
production purposes yet.  You have been warned!

In case you want to know more in detail what has changed in this
version, have a look at:

You can download a source package with generated PDF and HTML docs, as
well as binaries for Windows, from:

For an on-line version of the manual, visit:


About PyTables:


About the HDF5 library:


About NumPy:



Thanks to many users who provided feature improvements, patches, bug
reports, support and suggestions.  See the ``THANKS`` file in the
distribution package for a (incomplete) list of contributors.  Most
specially, a lot of kudos go to the HDF5 and NumPy (and numarray!)
makers.  Without them, PyTables simply would not exist.

Share your experience

Let us know of any bugs, suggestions, gripes, kudos, etc. you may


  **Enjoy data!**

Francesc Alted

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