Hatem Nassrat (el 2008-02-08 a les 23:27:00 -0400) va dir:: > On Fri, Feb 08, 2008 at 09:43:45AM +0100, Ivan Vilata i Balaguer wrote: > > > The demand for variable length fields has been a recurring topic in the > > list, but the implementation doesn't seem trivial at all and we would > > most probably need some external funding. > > So does HDF5 support these structures. I am new to HDF5 and pytables as > you can guess from my various questions, so I do not know how far has > pytables went with respect to wrapping the HDF5 database. Is there > anything that Pytables does that cannot be reacreated with maybe some > more c-code. Or is there some functionality that is present when > programming in C that has not yet made it into pytables namely the > variable width tables.
Yes, there are quite a few HDF5 features which aren't supported by
PyTables. PyTables wasn't created in the first place as a wrapper to
HDF5, but rather as an efficient and easy to use package for storing
large amounts of data, which uses HDF5 since it's one of the greatest
pieces of software for that matter. :)
However, this doesn't mean that the set of features supported by
PyTables is closed at all. While a few of them fall out of the scope of
PyTables (I'd say the most esoteric ones), other HDF5 features (like
packet tables with variable-length fields, or links in groups) fit into
the vision and could be added to PyTables if users showed an interest
for it and resources were available (in our case, Carabos, that means
time and funding for big tasks).
So yes, there are features in HDF5 not supported by PyTables and vice
versa. But don't they make for a great team? ;)
::
Ivan Vilata i Balaguer >qo< http://www.carabos.com/
Cárabos Coop. V. V V Enjoy Data
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