track_order not working on root group

This is a duplicate of https://github.com/h5py/h5py/issues/1097, it was closed but I still experience this issue.

import tempfile
import h5py
print(h5py.version.info)
ft = tempfile.mktemp(suffix='.hdf5')
h5py.get_config().track_order = True
h5 = h5py.File(ft, mode='w', track_order=True)
h5.create_group('z')
h5.create_group('a')
print("File just created", h5.keys())
h5.close()
h5 = h5py.File(ft, mode='r', track_order=True)
print("After reopening", h5.keys())

Output:

Summary of the h5py configuration
---------------------------------

h5py    2.10.0
HDF5    1.10.5
Python  3.7.0 | packaged by conda-forge | (default, Nov 12 2018, 20:15:55) 
[GCC 7.3.0]
sys.platform    linux
sys.maxsize     9223372036854775807
numpy   1.17.5

File just created <KeysViewHDF5 ['z', 'a']>
After reopening <KeysViewHDF5 ['a', 'z']>

[vasole]

Please, try to write h5[“/”].keys() instead of h5.keys(). The former works as expected for me but not the latter.

[mgarort]

@vasole I come a bit late to this conversation but I confirm that for me h5["/"].keys() keeps the order but h5.keys() does not.