Strange excaption while using Enum.

[ikrivosheev]

Describe the bug
After upgrade python to 3.11 we started get exceptions:

File "/usr/local/lib/python3.11/site-packages/clickhouse_driver/streams/native.py", line 74, in read
    column = read_column(self.context, column_type, n_rows,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/clickhouse_driver/columns/service.py", line 144, in read_column
    return col.read_data(n_items, buf)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/clickhouse_driver/columns/base.py", line 102, in read_data
    return self._read_data(n_items, buf, nulls_map=nulls_map)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/clickhouse_driver/columns/base.py", line 108, in _read_data
    return self.after_read_items(items, nulls_map)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/clickhouse_driver/columns/enumcolumn.py", line 48, in after_read_items
    return tuple(enum_cls(item).name for item in items)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/clickhouse_driver/columns/enumcolumn.py", line 48, in <genexpr>
    return tuple(enum_cls(item).name for item in items)
                 ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/enum.py", line 211, in __get__
    return self.fget(instance)
           ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/enum.py", line 1247, in name
    return self._name_

AttributeError: 'Enum8' object has no attribute '_name_'

After this error every query to the server finished with the exception. Restart python process helps. I don't know this is a issue clickhouse_driver or aioch
I make new connection for every query.

To Reproduce
My colleges and I couldn't make this one.

Expected behavior
A clear and concise description of what you expected to happen.

Versions

• clickhouse_driver 0.2.6
• aioch 0.2
• Python 3.11.5

[xzkostyan]

Hi. Can you reproduce this without aioch?

[ikrivosheev]

Hi. Can you reproduce this without aioch?

No, I cannot and I didn't try. Because my code depends on asyncio.
Well, maybe a problem is in the dynamic enum ganarated... But I couldn't find proofs.