Re: [Pytables-users] H5T_COMPOUND support in pytables?

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

A Divendres 11 Maig 2007 05:47, Eric Jonas escrigu=E9:
> Hello! Has anyone managed to get arrays of H5T_COMPOUND working in
> pytables, or found a workaround? I just wrote a bunch of C to create my
> nested array of compound data types, and I was all set to access this
> data from pytables, when I read
>
> http://www.pytables.org/docs/manual-2.0rc1/ape.html
>
> which seems to suggest that doing something like
>
> DATATYPE  H5T_COMPOUND {
>     H5T_STD_U8LE "src";
>     H5T_STD_U64LE "time";
>     H5T_ARRAY { [4]
>  	H5T_COMPOUND {
>                H5T_STD_U8LE "filtid";
>                H5T_STD_U8LE "valid";
>                H5T_STD_I32LE "threshold";
>                H5T_ARRAY { [32] H5T_STD_I32LE } "wave";
>             } } "waveforms";
>             }
> (from h5dump) just isn't going to work. This is really a bummer as
> pytables was one of the primary reasons I wanted to use HDF5 for this
> project. If anyone can recommend any work-arounds, or similar data
> organizations that work, I'd love to hear it.

PyTables (neither 1.x or 2.x series) doesn't implement support for arrays o=
f=20
compounds, sorry about that.  It does support, however, compounds of=20
compounds (nested tables in PyTables jargon) and compounds of arrays, so=20
instead of declaring a column as an array of compounds, you may want to=20
declare it as a compound of arrays.

HTH,

=2D-=20
>0,0<   Francesc Altet =A0 =A0 http://www.carabos.com/
V   V   C=E1rabos Coop. V. =A0=A0Enjoy Data
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