H5A.get_num_attrs
oct-hdf5: attr_count = H5A.get_num_attrs (loc_id)
Return the number of attributes if successful; otherwise return a negative value.
Parameters:
| loc_id | Identifier of a group, dataset, or named datatype |
Description:
See original function at https://support.hdfgroup.org/documentation/hdf5/latest/group___h5_a.html.