[Python-Dev] Is static typing still optional? (original) (raw)

Eric V. Smith eric at trueblade.com
Wed Dec 20 20:13:55 EST 2017

On 12/20/2017 6:57 PM, Mike Miller wrote:

On 2017-12-19 02:53, Paul Moore wrote:

Also, the fact that no-one raised this issue during the whole time the PEP was being discussed (at least as far as I recollect) and that Guido (who of all of us should be most aware of what is and isn't acceptable use of annotations in the stdlib) approved the PEP, suggests to me that this isn't that big a deal.

Hi, I asked about this in the first posting of the PEP and agree with Chris. https://mail.python.org/pipermail/python-dev/2017-September/149406.html There is definitely a passive bias towards using types with dataclasses in that the Eric (the author) doesn't appear to want an example without them in the pep/docs.

I'm not sure what such an example would look like. Do you mean without annotations? Or do you mean without specifying the "correct" type, like:

@dataclass class C: x: int = 'hello world'

?

Or something else?

Can you provide an example of what you'd like to see?

It seems that typing proponents are sufficiently enamored with them that they can't imagine anyone else feeling differently, haha.

I've never used typing or mypy, so you're not talking about me. I do like the conciseness that annotations bring to dataclasses, though. If you buy that (and you might not), then I don't see the point of not using a correct type annotation.

Eric.

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