[Twisted-Python] [RFC] Drop support for Python 3.5 sometime after May 2021?

[Amber Brown]

Xenial's 3.5.1/3.5.2 sucks and doesn't have some asyncio functionality (due to it being provisional then?) which means things like Eliot doesn't work due to aiocontextvars barfing on missing functionality. There's also 20.04 LTS now, making 16.04 old-old-LTS. I don't think it's worth it. 

- Amber

On Thu, 14 May 2020, at 15:18, Moshe Zadka wrote:
> May 2021 seems to be right around when Xenial (Which has 3.5) falls 
> into ESM, so maybe we can wait?
> I don't have strong feelings, but it is a datapoint.
> 
> Moshe Z.
> 
> On Wed, May 13, 2020, at 22:13, Glyph wrote:
> > On May 13, 2020, at 10:04 PM, Amber Brown (hawkowl) <hawkowl at atleastfornow.net> wrote:
> > > 
> > > On 14/5/20 5:10 am, Craig Rodrigues wrote:
> > >> I would like to propose that Twisted drop support for Python 3.5 one year from now in 2021.
> > > 
> > > I was considering proposing dropping it soon (I was thinking when we had 3.8 support, that 3.6/3.7/3.8 is a reasonable compatibility matrix).
> > 
> > 
> > I'm also inclined to say sooner rather than later; I don't know the numbers but my impression is that 3.x uptake began for real at 3.4 and in earnest at 3.6, so there aren't that many people still on 3.5.
> > 
> > The lack of variable annotations, in particular, seems like a sticking point with 3.5 as we attempt to adopt mypy.
> > 
> > -g
> > 
> > 
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