Discussion:
pytables api to H5Tpack?
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Ken Walker
2018-10-26 21:44:23 UTC
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In the process of writing a utility to reorganize HDF5 data into separate
files, I've tripped into an issue with compound data types.
This is what I am told by the developers for 2 applications that I deal
with (one upstream/creates, the other downstream/consumes my data)
They expect compound data types to be packed. When I use Pytables to copy,
some datasets are unpacked, and this results in an alignment error with
unexpected "random data" that plays havoc when the downstream application
reads the file.
I'm told this can be addressed with H5Tpack(). Is that HDF5 function
exposed thru the Pytables API? Or, is there another way to accomplish this
task?
Thanks.
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Francesc Alted
2018-10-30 08:04:04 UTC
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Hi Ken,

No, H5Tpack() is not exposed by PyTables directly. If you need that, h5py
is probably a better bet.

Francesc
Post by Ken Walker
In the process of writing a utility to reorganize HDF5 data into separate
files, I've tripped into an issue with compound data types.
This is what I am told by the developers for 2 applications that I deal
with (one upstream/creates, the other downstream/consumes my data)
They expect compound data types to be packed. When I use Pytables to copy,
some datasets are unpacked, and this results in an alignment error with
unexpected "random data" that plays havoc when the downstream application
reads the file.
I'm told this can be addressed with H5Tpack(). Is that HDF5 function
exposed thru the Pytables API? Or, is there another way to accomplish this
task?
Thanks.
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"pytables-users" group.
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Francesc Alted
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