Error Reading Enum Attributes

[kmuehlbauer]

import h5py
import pyfive
import numpy as np


f = h5py.File('enum_attrs.hdf5', 'w')
attrs = f.attrs

# Define an enum dtype
enum_dtype = h5py.special_dtype(
    enum=(np.int32, {'one': 1, 'two': 2, 'three': 3})
)
# Create an attribute with that enum dtype
attrs.create('enum', 2, dtype=enum_dtype)

f.close()

with pyfive.File('enum_attrs.hdf5') as hfile:
    import h5py
    enum_attr = hfile.attrs['enum']
    assert enum_attr == 2
    assert enum_attr.dtype == enum_dtype
    )

Traceback (most recent call last):
  File "/home/kai/mambaforge/envs/xr_312_np2/lib/python3.12/site-packages/IPython/core/interactiveshell.py", line 3577, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-2-4c07ea7bf2a5>", line 20, in <module>
    enum_attr = hfile.attrs['enum']
                ^^^^^^^^^^^
  File "/home/kai/PycharmProjects/pyfive/pyfive/high_level.py", line 158, in attrs
    self._attrs = self._dataobjects.get_attributes()
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/kai/PycharmProjects/pyfive/pyfive/dataobjects.py", line 147, in get_attributes
    name, value = self.unpack_attribute(offset)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/kai/PycharmProjects/pyfive/pyfive/dataobjects.py", line 187, in unpack_attribute
    return self._parse_attribute_msg(self.msg_data, offset)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/kai/PycharmProjects/pyfive/pyfive/dataobjects.py", line 240, in _parse_attribute_msg
    value = value[0]
            ~~~~~^^^
KeyError: 'There are no fields in dtype int32.'

I traced this back to a mismatch in DataObjects._attr_value, where instead of the value, the datatype of an enum is returned.