On 06/07/2013 11:45 PM, Steven D'Aprano wrote:
On 08/06/13 15:18, Stephen J. Turnbull wrote:
Ethan Furman writes:
> Enumerations can be pickled and unpickled::
>
> >>> from enum import Enum
> >>> class Fruit(Enum):
> ... tomato = 1
> ... banana = 2
> ... cherry = 3
> ...
> >>> from pickle import dumps, loads
> >>> Fruit.tomato is loads(dumps(Fruit.tomato))
> True
> [...]
> Still, it would be nice if this could work.
Well, you could cheat and reverse the test. ;-)
I assume the problem is that loads proceeds to recreate the Fruit
enum, rather than checking if there already is one?
I don't believe so. I understand that the problem is that pickle cannot find
the Fruit enum in the __main__ module.
Untested, but adding this before the call to dumps might work:
import __main__
__main__.Fruit = Fruit
although that's the sort of thing that makes me think it's time to turn this
into a unittest rather than a doctest.
Indeed, and it is already in several different ways. But it would be nice to have a pickle example in the docs that
worked with doctest.
I ended up doing what Barry did:
>>> from test.test_enum import Fruit
>>> from pickle import dumps, loads
>>> Fruit.tomato is loads(dumps(Fruit.tomato))
True
--
~Ethan~
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