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From Michael Kjellman <>
Subject Re: [PROPOSAL] Migrate to pytest from nosetests for dtests
Date Wed, 29 Nov 2017 17:54:29 GMT
i keep seeing nose randomly handing after a test successfully completes execution. i’m very
far from a python guru but i spent a few hours with gdb trying to debug the thing and get
python stacks and got symbolicated native stacks but it’s random but root causing while
nose is sitting on a lock forever alludes me. some tests are more reproducible than others.
some i see fail 1 in 10 runs.

the net of it all though is this makes people not trust dtests because it randomly hangs and
shows tests with “failures” that actually succeeded.

i’m not a huge fan of just blindly upgrading to fix a problem but in this case I found that
there is quite a lot of mistrust and dislike for nosetests in the python community with most
projects already moving to pytest. and if it is some complicated set of interactions between
threads we use in the tests and how nose works do we really want to even debug it when the
project appears to be abandoned?

i think regardless of the root cause for making things more stable it seems like there is
little motivation to stick around on nose...



> On Nov 29, 2017, at 5:33 AM, Philip Thompson <> wrote:
> I don't have any objection to this, really. I know I rely on a handful of
> nose plugins, and possibly others do, but those should be easy enough to
> re-write. I am curious though, what's the impetus for this? Is there some
> pytest feature we want that nose lacks? Is there some nosetest bug or
> restriction getting in the way?
>> On Tue, Nov 28, 2017 at 8:34 PM, Jon Haddad <> wrote:
>> +1
>> I stopped using nose a long time ago in favor of py.test.  It’s a
>> significant improvement.
>>> On Nov 28, 2017, at 10:49 AM, Michael Kjellman <>
>> wrote:
>>> I'd like to propose we move from nosetest to pytest for the dtests. It
>> looks like nosetests is basically abandoned, the python community doesn't
>> like it, it hasn't been updated since 2015, and pytest even has nosetests
>> support which would help us greatly during migration (
>>> Thoughts?
>>> best,
>>> kjellman
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