:D -- Ryan [ERROR]: Your autotools build scripts are 200 lines longer than your program. Something’s wrong. http://kirbyfan64.github.io/ On Sep 7, 2016 1:20 PM, "Guido van Rossum" <gu...@python.org> wrote:
> I'm accepting PEP 526 provisionally. > > I am personally confident that this PEP is adding a useful new feature > to the language: annotations that can be used by a wide variety of > tools, whether off-line type checkers or frameworks that add runtime > checking (e.g. traits or traitlets). > > The provisional status reflects the understanding that minor details > of the proposed syntax and its runtime effects may still have to > change based on experience during the 3.6 life cycle. (For example, > maybe we end up not liking ClassVar, or maybe we'll decide we'll want > to support `x, y, z: T` after all.) > > There's been some quite contentious discussion about the PEP, on and > off python-dev, regarding how the mere presence of annotation syntax > in the language will change the way people will see the language. My > own experience using mypy and PyCharm has been quite different: > annotations are a valuable addition for large code bases, and it's > worth the effort to add them to large legacy code bases (think > millions of lines of Python 2.7 code that needs to move to Python 3 by > 2020). The effect of this has been that engineers using Python are > happier and more confident that their code works than before, have an > easier time spelunking code they don't know, and are less afraid of > big refactorings (where conversion to Python 3 can be seen as the > ultimate refactoring). > > I should blog about our experience at Dropbox; I hope the Zulip open > source folks (not at Dropbox) will also blog about their experience. > In the meantime you can read Daniel F. Moisset's three-part blog about > adding annotations to pycodestyle (formerly pep8) here: > > http://www.machinalis.com/blog/a-day-with-mypy-part-1/ > > If you want to see a large open source code base that's annotated for > mypy (with 97% coverage), I recommend looking at Zulip: > https://github.com/zulip/zulip > > Finally, some of us are starting a new (informational) PEP to set > expectations for how type checkers should make use of the annotation > syntax standardized by PEP 484 and PEP 526. This is going to take more > time, and new collaborators are welcome here: > https://github.com/ilevkivskyi/peps/blob/new-pep/pep-0555.txt. (Mark, > I really hope you'll accept the invitation to participate. Your > experience would be most welcome.) > > -- > --Guido van Rossum (python.org/~guido) > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: https://mail.python.org/mailman/options/python-dev/ > rymg19%40gmail.com >
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