Hi,
I'd like to attach a configuration file to the output of some simulation
software. This helps to improve the traceability of our results. Right now
I'm using a filenode to attach the file. This results is an EArray with
unsigned byte values. Very efficient, space conscious, and very hard to
decipher with hdfview. The configuration file is an ASCII file. I don't
know how ViTables handles this (not installed the software (yet)).
In HDF-EOS (5) some metadata is attached as an HDF5 Scalar Dataset. See
for instance the OMI cloud product [1]. In these files a group is added
("HDFEOS INFORMATION") with ArchiveMetadata.0, CoreMetadata.0 and
StructMetadata.0 scalar datasets. These appear as text 'files' within
hdfview.
When read with pytables, the object's str representation gives:
/HDFEOS INFORMATION/ArchiveMetadata.0 (Array()) ''
atom := StringAtom(itemsize=65535, shape=(), dflt='')
maindim := 0
flavor := 'numpy'
byteorder := 'irrelevant'
chunkshape := None
What is the most convenient way of storing a configuration file like this
in a pytables file?
Due to all the unfortunate spaces in the HDF-EOS format's group names, the
calling sequence to arrive at the string is somewhat awkward (fname
contains a path to an OMI file):
h5file = tables.openFile(fname, 'r')
ArchiveMetadata = h5file.root._f_getChild('HDFEOS
INFORMATION')._f_getChild('ArchiveMetadata.0').read()
lines = ArchiveMetadata.tostring().strip('\x00').splitlines()
The natural naming scheme is more convenient, and will be employed in my
files.
Best,
Maarten
[1]
http://mirador.gsfc.nasa.gov/cgi-bin/mirador/collectionlist.pl?keyword=omcldo2
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