Discussion:
Unimplemented Leaf: Enumerated Arrays with Enumeration Attributes linked to the group Attributes
(too old to reply)
Anthony Cordon
2017-10-05 18:17:54 UTC
Permalink
Hello,

I am currently working with datasets where when a group contains and
enumerated array, the enumerations are set as a group attribute vice a
field or column attribute. The datatype attribute of the column is then a
path to the particular group attribute.

This is currently the only dataset that I can not read via pytables.

The data is on a closed network so im unable to share a copy of the
structure, but can provide a structure example below.

Any recommendation on how to approach accessing the data by ingorged
EnumNamedDatatypePath in the development of the leaf or add the node
format? If so, where could I do this?

I am able to access the data when i manipulate the format to remove the
enumerations or change the location of the enumerations, but this is not a
viable method as historical data must be read. I was only able to make
these changes upon initial creation of the data.

MATLAB handles reading this just fine as it stores
'EnumNamedDatatypePath:/SYS/MSG/DETECTIONS/DETECTIONS/CATEGORY' as an
attribute

examples:

Does Not Work (Format expected by some specialized tools, but does not work
in pytables):

Group '/SYS/MSG/PRIM_SENSOR'
Datatype 'CATEGORY': H5T_ENUM
Base Type: H5T_STD_U8LE
Member: 'Undefined': 0
Member: 'Early': 1
Member: 'Late': 2
Dataset 'DETECTIONS'
Size: 864
Datatype: H5T_COMPOUND
Member 'CATEGORY': H5T_ENUM
Base Type: H5T_STD_U8LE
Member 'EnumNamedDatatypePath:/SYS/MSG/PRIM_SENSOR/CATEGORY':
255

Works (Modified structure, but not compatible with specialized tools):

Group '/SYS/MSG/PRIM_SENSOR'
Dataset 'DETECTIONS'
Size: 864
Datatype: H5T_COMPOUND
Member 'CATEGORY': H5T_ENUM
Base Type: H5T_STD_U8LE
Member: 'Undefined': 0
Member: 'Early': 1
Member: 'Late': 2
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