Unless I read your request or the documentation wrong, h5py already supports pulling specific fields out of "compound data types":
http://h5py.alfven.org/docs-1.1/guide/hl.html#id3 > For compound data, you can specify multiple field names alongside > the numeric slices: > >>> dset["FieldA"] > >>> dset[0,:,4:5, "FieldA", "FieldB"] > >>> dset[0, ..., "FieldC"] Is this latter style of access what you were asking for? (Or is the problem that it's not fast enough in hdf5, even with the shuffle filter, etc?) So then the issue is that there's a dependency on hdf5 and h5py? (or if you want to access LZF-compressed files without h5py, a dependency on hdf5 and the C LZF compressor?). This is pretty lightweight, especially if you're proposing writing new code which itself would be a dependency. So your new code couldn't depend on *anything* else if you wanted it to be a fewer-dependencies option than hdf5+h5py, right? Zach _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
