[Python-Dev] doctest and pickle

Ethan Furman ethan at stoneleaf.us
Fri Jun 7 20:02:54 CEST 2013

On 06/07/2013 10:54 AM, Mark Janssen wrote:
> On Fri, Jun 7, 2013 at 10:50 AM, Mark Janssen <dreamingforward at gmail.com> wrote:
>>>      >>> from pickle import dumps, loads
>>>      >>> Fruit.tomato is loads(dumps(Fruit.tomato))
>>>      True
>> Why are you using is here instead of ==?  You're making a circular
>> loop using "is"
> I should add that when you're serializing with pickle and then
> reloading, the objects should be seen as "essentially equivalent".
> This means that they are either byte-by-byte equivalent (not sure
> actually if Python actually guarantees this), or every element would
> still compare equal and that is what matters.

In most cases, sure.  But one of the invariants of Enums is that there is only ever one of each member specifically so 
that `is` tests work.


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