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eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-devel] [PATCH v3 6/8] iotests: Test driver whitelisting in 093 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , qemu-devel@nongnu.org, qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 9/17/19 9:42 AM, Kevin Wolf wrote: > Am 17.09.2019 um 15:09 hat John Snow geschrieben: >> On 9/17/19 7:22 AM, Kevin Wolf wrote: >>> Am 17.09.2019 um 13:07 hat Max Reitz geschrieben: >>>> On 17.09.19 10:40, Kevin Wolf wrote: >>>>> Am 17.09.2019 um 10:18 hat Max Reitz geschrieben: >>>>>> On 13.09.19 20:30, John Snow wrote: >>>>>>> I'd still like to define func_wrapper with a nod to the type cons= traint >>>>>>> it has: >>>>>>> >>>>>>> def func_wrapper(instance: iotests.QMPTestCase, *args, **kwargs): >>>>>>> [...] >>>>>>> >>>>>>> >>>>>>> Then, you'd write: >>>>>>> >>>>>>> if callable(required_formats): >>>>>>> fmts =3D required_formats(instance) >>>>>>> else: >>>>>>> fmts =3D required_formats >>>>>> >>>>>> Yep, that anyway. (Although I didn=E2=80=99t know about the =E2=80= =9Cparam: type=E2=80=9D >>>>>> syntax and put that constraint in a comment instead. Thanks again= :-)) >>>>> >>>>> Note that function annotations are Python 3 only, so we can't use t= hat >>>>> syntax yet anyway. If you want to use type hints that are understoo= d by >>>>> tools (like mypy) and compatible with Python 2, you have to use >>>>> something like this (feel free to be more specific than Any): >>>> >>>> Do we really feel like staying compatible with Python 2, though? >>> >>> Feel like it? No. >>> >>> It's more that we are compelled to do so because we only deprecated i= t >>> in 4.1. >> >> Sorry for the impromptu lesson on type hints in 3.5! I added that in t= o >> my suggestion as a demonstrative example and didn't mean for you to us= e >> it as-is, sorry for not making that clear. >> >> I'm confused about the Python3 deprecation timeline. Normally we'd >> follow our standard approach, but it does hit EOL at the end of this >> year, so do we drop support then, too? I have the memory of a goldfish= I >> suppose, and can't quite remember our conclusions, if any, of previous >> discussions on this subject. >=20 > It shouldn't make a difference actually because deprecation in 4.1 mean= s > that 4.2 (in December) will be the last release that must still support > Python 2, and we can switch to Python 3 for 5.0. >=20 >> If we do drop python2 though, the new minimum version appears to be 3.= 5 >> because that's what ships in EPEL. That'd give us standardized type >> hints that we can use for static analysis tools. >=20 > Actually I seem to remember I suggested that we should make 3.5 the > minimum Python 3 version, and I thought a patch to this effect had been > merged, but now I can't find any such check in configure. Maybe I shoul= d > find the old thread again to see if there was any reason not to do this= . >=20 > Personally, I would have preferred 3.6 because it brings in variable > annotations, but I think last time the conclusion was that it would be > 3.5 indeed. >=20 And with variable annotations you get data classes too, I believe, which are quite handy. Oh well. I have a patch that replaces the configure checks, but there are a few places in docker and the EDK2 build where we require python2 still, so I have a few threads to chase down before proposing a patch. Stay tuned, I guess. --js