[Python-Dev] PEP 526 ready for review: Syntax for Variable and Attribute Annotations (original) (raw)

Guido van Rossum guido at python.org
Thu Sep 1 16:25:17 EDT 2016

On Thu, Sep 1, 2016 at 10:01 AM, Koos Zevenhoven <k7hoven at gmail.com> wrote:

On Thu, Sep 1, 2016 at 5:46 PM, Guido van Rossum <guido at python.org> wrote:

IOW, PEP 3157 is not dead yet. Indeed.

PEP 3157? Is that a typo or is there such a thing somewhere?

Sorry, 3107 (the original Function Annotations PEP).

[...] I hope there will at least be a recommendation somewhere (PEP 8?) to not mix the two styles of attribute annotation (beginning of class / in method). The whole readability benefit turns against itself if there are some non-ClassVar variables annotated outside init and then the rest somewhere in init and in whatever initialization helper methods init happens to call.

Yeah, but then again, in general I don't believe you can legislate the writing of readable code using crude syntactic means. Not mixing the two in the same class sounds like pretty good advice though, and a linter should be able to catch that easily.

-- --Guido van Rossum (python.org/~guido)

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