On Thu, Apr 20, 2017 at 12:05 PM, Stephan Hoyer <[email protected]> wrote: > > On Thu, Apr 20, 2017 at 11:53 AM, Robert Kern <[email protected]> wrote: >> >> I don't know of a format off-hand that works with numpy uniform-length strings and Unicode as well. HDF5 (to my recollection) supports arrays of NULL-terminated, uniform-length ASCII like FITS, but only variable-length UTF8 strings. > > > HDF5 supports two character sets, ASCII and UTF-8. Both come in fixed and variable length versions: > https://github.com/PyTables/PyTables/issues/499 > https://support.hdfgroup.org/HDF5/doc/Advanced/UsingUnicode/index.html > > "Fixed length UTF-8" for HDF5 refers to the number of bytes used for storage, not the number of characters.
Ah, okay, I was interpolating from a quick perusal of the h5py docs, which of course are also constrained by numpy's current set of dtypes. The NULL-terminated ASCII works well enough with np.string's semantics. -- Robert Kern
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