[Pytables-users] ANN: PyTables-1.2-pre2

[Francesc A. <fa...@ca...>]

Hi List,

We are in the final stages before releasing PyTables 1.2, which
offers, as I already said here, a new LRU cache for keeping only the
most used nodes in-memory, and not all the nodes as before.

One of the main consequences of that is very fast opening of files,
iregardingly of how many nodes (groups + leaves) has on it. For
example, with PyTables 1.1.1, a file with 3000 nodes took 2.4 seconds
(5.5 seconds in PyTables 1.1) to be opened; now, PyTables 1.2 takes
just 0.03 seconds, which is very good news, specially for
interactively working with files with such a large number of nodes.

I'd liked to include the patch sent by travlr, to be able to use
indexing to get and set values in *Array, Table and Column objects
(i.e. "indexing a la numarray"); but provided he sent a patch just for
getting values in Table and Column objects and that we are rather busy
right now, we've decided to not incorporate this functionality until a
next version, when all the objects would receive complete support for
both getting and setting values "a la numarray".

You can download the current tarball from:

http://www.carabos.com/downloads/pytables/preliminary/pytables-1.2-pre2.tar=
=2Egz

Please, help us to test this new version before it would be released!

Have a nice weekend!

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