[Twisted-Python] Twisted 21.7.0 Pre-Release Announcement

Adi Roiban adiroiban at gmail.com
Thu Jul 15 10:40:22 MDT 2021


On Thu, 15 Jul 2021 at 17:02, Richard van der Hoff <richard at matrix.org>
wrote:

> On 11/07/2021 00:49, Glyph wrote:
>
> Thank you Adi!  Very glad to see us collectively getting back on the
> release-management horse again!  And it was super encouraging to see how
> quickly you were able to get this out, with all the automation that
> everyone (not least of all yourself) has been building to make this process
> faster and simpler.
>
> To echo this: thank you for your work, Adi!
>
> It appears we've buried the lede on one of our biggest features in this
> release though - https://github.com/twisted/twisted/pull/1448/files had
> no newsfile that shows up in the changelog, but it properly made Deferred
> into a generic, so I think this is the first release of Twisted where you
> might *reasonably* be able to use mypy without your own custom stub
> files! :)
>
> This looks very cool, but presents us with a problem.
>
> mypy now complains about instantiations of Deferred without a type
> annotation:
>
> > d = defer.Deferred()
>
> results in an error:
>
> > synapse/util/async_helpers.py:124: error: Need type annotation for 'd'
> [var-annotated]
>
> We can't just go and add type annotations because we need to maintain
> compatibility with older Twisted (to make it possible to package in Debian
> et al).
>
> Any suggestions for keeping mypy happy?
>
I also don't have much experience with mypy, but I guess that you can
ignore the errors from twisted.internet.defer via mypy.ini

[mypy-twisted.internet.defer]
allow_untyped_defs = True

-- 
Adi Roiban
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