Offset of field of compound data type
output = H5T.get_member_offset(type_id,membno)
output = H5T.get_member_offset(type_id,membno) returns
the byte offset of the field specified by membno in
the compound data type specified by type_id. Note
that zero (0) is a valid offset.
fid = H5F.open('example.h5'); dset_id = H5D.open(fid,'/g3/compound'); type_id = H5D.get_type(dset_id); idx = H5T.get_member_offset(type_id,1);