Cannot create H5T_ARRAY attribute

[anemes]

There is an existing hdf5 structure that I am trying to emulate with h5py.

In this, there is an attribute that h5dump reports as

            ATTRIBUTE "spacing" {
               DATATYPE  H5T_ARRAY { [3] H5T_IEEE_F32LE }
               DATASPACE  SCALAR
               DATA {
               (0): [ 13, 14, 15 ]
               }
            }

No matter how I pass the values [13,14,15] to .attrs.create or with what dtype, I do not end up with a DATATYPE H5T_ARRAY, but with DATATYPE H5T_IEEE_F32LE

            ATTRIBUTE "spacing" {
               DATATYPE  H5T_IEEE_F32LE
               DATASPACE  SIMPLE { ( 3 ) / ( 3 ) }
               DATA {
               (0): 13, 14, 15
               }
            }

Is there a way to force H5T_ARRAY attribute datatypes?

• Operating System CentOS 7
• Python version 3.5
• SCL Python
• h5py version 2.7.1
• HDF5 version 1.8.18

[aragilar]

There's no way to force the high-level interface to use a particular format, other than specifying dtype. I suggest using the low-level interface to create the attribute.

[anemes]

I didn't look deep enough into the documentation. Thank you!