[Pytables-users] Error reading attribute with compound data type

[dashesy <da...@gm...>]

I have a file that has attributes with nested compound type, when
reading it with PyTables 2.4.0 I get this error:

C:\Python27\lib\site-packages\tables\attributeset.py:293:
DataTypeWarning: Unsupported type for attribute 'BmiRoot' in node '/'.
Offending HDF5 class: 6
  value = self._g_getAttr(self._v_node, name)
C:\Python27\lib\site-packages\tables\attributeset.py:293:
DataTypeWarning: Unsupported type for attribute 'BmiChanExt' in node
'channel00001'. Offending HDF5 class: 6
  value = self._g_getAttr(self._v_node, name)

Hard to say what exactly happens, just wanted to know if this is not
already fixed in newer versions I will be more than happy to work on
it, any pointers as to where to look is appreciated.

Here is the (partial) dump of the file (for brevity I deleted
non-related data parts but can provide the full file if needed):

HDF5 "pause5-10-5.ns2.h5" {
GROUP "/" {
   ATTRIBUTE "BmiRoot" {
      DATATYPE  "/BmiRootAttr_t"
      DATASPACE  SIMPLE { ( 1 ) / ( 1 ) }
      DATA {
      (0): {
            1,
            0,
            0,
            1,
            "2008-12-02 22:57:02.251000",
            "1 kS/s",
            ""
         }
      }
   }
   DATATYPE "BmiRootAttr_t" H5T_COMPOUND {
      H5T_STD_U32LE "MajorVersion";
      H5T_STD_U32LE "MinorVersion";
      H5T_STD_U32LE "Flags";
      H5T_STD_U32LE "GroupCount";
      H5T_STRING {
         STRSIZE H5T_VARIABLE;
         STRPAD H5T_STR_NULLTERM;
         CSET H5T_CSET_ASCII;
         CTYPE H5T_C_S1;
      } "Date";
      H5T_STRING {
         STRSIZE H5T_VARIABLE;
         STRPAD H5T_STR_NULLTERM;
         CSET H5T_CSET_ASCII;
         CTYPE H5T_C_S1;
      } "Application";
      H5T_STRING {
         STRSIZE H5T_VARIABLE;
         STRPAD H5T_STR_NULLTERM;
         CSET H5T_CSET_ASCII;
         CTYPE H5T_C_S1;
      } "Comment";
   }
   GROUP "channel" {
      DATATYPE "BmiChanAttr_t" H5T_COMPOUND {
         H5T_STD_U16LE "ID";
         H5T_IEEE_F32LE "Clock";
         H5T_IEEE_F32LE "SampleRate";
         H5T_STD_U8LE "SampleBits";
      }
      DATATYPE "BmiChanExt2Attr_t" H5T_COMPOUND {
         H5T_STD_I32LE "DigitalMin";
         H5T_STD_I32LE "DigitalMax";
         H5T_STD_I32LE "AnalogMin";
         H5T_STD_I32LE "AnalogMax";
         H5T_STRING {
            STRSIZE 16;
            STRPAD H5T_STR_NULLTERM;
            CSET H5T_CSET_ASCII;
            CTYPE H5T_C_S1;
         } "AnalogUnit";
      }
      DATATYPE "BmiChanExtAttr_t" H5T_COMPOUND {
         H5T_IEEE_F64LE "NanoVoltsPerLSB";
         H5T_COMPOUND {
            H5T_STD_U32LE "HighPassFreq";
            H5T_STD_U32LE "HighPassOrder";
            H5T_STD_U16LE "HighPassType";
            H5T_STD_U32LE "LowPassFreq";
            H5T_STD_U32LE "LowPassOrder";
            H5T_STD_U16LE "LowPassType";
         } "Filter";
         H5T_STD_U8LE "PhysicalConnector";
         H5T_STD_U8LE "ConnectorPin";
         H5T_STRING {
            STRSIZE H5T_VARIABLE;
            STRPAD H5T_STR_NULLTERM;
            CSET H5T_CSET_ASCII;
            CTYPE H5T_C_S1;
         } "Label";
      }
      DATATYPE "BmiChanFiltAttr_t" H5T_COMPOUND {
         H5T_STD_U32LE "HighPassFreq";
         H5T_STD_U32LE "HighPassOrder";
         H5T_STD_U16LE "HighPassType";
         H5T_STD_U32LE "LowPassFreq";
         H5T_STD_U32LE "LowPassOrder";
         H5T_STD_U16LE "LowPassType";
      }
      GROUP "channel00001" {
         ATTRIBUTE "BmiChan" {
            DATATYPE  "/channel/BmiChanAttr_t"
            DATASPACE  SIMPLE { ( 1 ) / ( 1 ) }
            DATA {
            (0): {
                  1,
                  30000,
                  1000,
                  16
               }
            }
         }
         ATTRIBUTE "BmiChanExt" {
            DATATYPE  "/channel/BmiChanExtAttr_t"
            DATASPACE  SIMPLE { ( 1 ) / ( 1 ) }
            DATA {
            (0): {
                  1000,
                  {
                     750000,
                     4,
                     1,
                     7500,
                     3,
                     1
                  },
                  1,
                  1,
                  "elec1"
               }
            }
         }
         ATTRIBUTE "BmiChanExt2" {
            DATATYPE  "/channel/BmiChanExt2Attr_t"
            DATASPACE  SIMPLE { ( 1 ) / ( 1 ) }
            DATA {
            (0): {
                  -8191,
                  8191,
                  -8191,
                  8191,
                  "uV"
               }
            }
         }
         DATASET "continuous_set" {
            DATATYPE  H5T_STD_I16LE
            DATASPACE  SIMPLE { ( 631 ) / ( H5S_UNLIMITED ) }
            DATA {...
            }
         }
      }
   }
}
}