[Python-ideas] Lessons from typing hinting Whoosh (PEP484)

[Guido van Rossum]

There's an existing (but postponed) proposal to use Type[X]:
https://github.com/ambv/typehinting/issues/107

On Mon, Nov 16, 2015 at 7:36 PM, Ryan Gonzalez <rymg19 at gmail.com> wrote:
>
>
> On November 16, 2015 8:51:38 PM CST, Guido van Rossum <guido at python.org> wrote:
>>#1: typing.re defines the re types. For the others, the typeshed
>>project takes contributions.
>>
>>#2: You can use def f() -> type: ... to specify a class as return
>>type; but we currently don't have a way to contrain that class.
>>
>
> What about a typing.Class or typing.Type generic? Like:
>
> def f() -> Type[MyBaseClass]: ...
>
>>On Mon, Nov 16, 2015 at 6:41 PM, Matt Chaput <matt at whoosh.ca> wrote:
>>> I forgot to say, there's been a couple of places where I haven't been
>>able to add hinting that hopefully can be improved:
>>>
>>> 1. Standard library types that should be public but aren't (regular
>>expression object)
>>> 2. Specifying an argument/return that's a class (that should be a
>>subclass of some class).
>>>
>>> There might be a way to do 2 that I don't know about :)
>>>
>>> Cheers,
>>>
>>> Matt
>>>
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>
> --
> Sent from my Nexus 5 with K-9 Mail. Please excuse my brevity.



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