I have reviewed PEP 561 and I intend to accept it some time next week, unless significant discussion happens between now and then.
The latest version of the PEP can be found at https://www.python.org/dev/peps/pep-0561/ PEP 561 solves a big problem for users of static type checkers like mypy and Pyre (as well as pytype and PyCharm): how to scale the creation of stubs (files with just type annotations, with a .pyi extension). IMO Ethan Smith has done a great job both coming up with and revising the design, and crafting an implementation -- most of PEP 561 is already supported by mypy. It's been a while since a copy of the PEP was posted to python-dev ( https://mail.python.org/pipermail/python-dev/2018-April/152694.html), but only a few things changed since then, so I'll just link to the change history: https://github.com/python/peps/commits/master/pep-0561.rst. Only the last two commits are new since the last posting: support for partial packages and a bunch of small textual tweaks I found today while reviewing. There wasn't a lot of feedback then so I don't expect a flamewar today, but better late than never. ;-) -- --Guido van Rossum (python.org/~guido)
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