Thanks, I'll try to make it work with the latter method somehow. Clearing 
all session event listeners is not an option because some of the code under 
test relies on a permanent listener being there.

keskiviikko, 11. syyskuuta 2013 21.15.46 UTC+3 Michael Bayer kirjoitti:
>
> you can either remove all the listeners for a certain type, like this:
>
>         events.MapperEvents._clear()
>
> the other alternative is wrap your events with a set that you control:
>
> my_listeners = set()
>
> @event.listens_for(target, "whatever")
> def evt(target):
>    for listener in my_listeners:
>         listener(target)
>
>
>
> On Sep 11, 2013, at 1:44 PM, Alex Grönholm 
> <alex.g...@nextday.fi<javascript:>> 
> wrote:
>
> Thanks for the quick reply. I don't want to use prerelease versions of 
> SQLAlchemy though. Is there any recommended way of doing this in 0.8.2?
>
> keskiviikko, 11. syyskuuta 2013 20.40.40 UTC+3 Michael Bayer kirjoitti:
>>
>>
>> On Sep 11, 2013, at 1:16 PM, Alex Grönholm <alex.g...@nextday.fi> wrote: 
>>
>> > I'm trying to test code that listens to session events on all sessions. 
>> I can't pin it on any particular session or even sessionmaker due to the 
>> architecture of the software (sessions are explicitly instantiated on the 
>> fly). 
>> > All is well except that the listener sticks after the test is done, 
>> breaking test isolation. The ideal solution would be to unregister the 
>> listener in teardown(), but I don't see anything in the event API that 
>> could be used to do that. 
>>
>> the public API is in 0.9 (of course there are crude hacks in 0.8) :  
>> http://docs.sqlalchemy.org/en/latest/changelog/migration_09.html#event-removal-api
>>  
>>
>>
>>
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