[Python-Dev] Re: PEP: Deferred Evaluation Of Annotations Using Descriptors

2021年1月18日 12:28:07 -0800

On Sun, Jan 17, 2021 at 7:33 AM Larry Hastings <[email protected]> wrote:
> If your imports are complicated, you could always hide them in a
> function. I just tried this and it seems to work fine:
>
> def my_imports():
> global other_mod
> import other_mod
>
> So, you could put all your imports in such a function, run it from inside
> a "if typing.TYPE_CHECKING" block, and you'd have a convenient way of doing
> all your imports from inside IPython too.
>
But static type checkers won't understand such imports. (Or is this about
annotations used for other purposes? Then I suppose it's fine, but only as
long as you completely give up static type checks for modules that use this
idiom.)
-- 
--Guido van Rossum (python.org/~guido)
*Pronouns: he/him **(why is my pronoun here?)*
<http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
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