Re: [Python-Dev] Accepting PEP 560 -- Core support for typing module and generic types

2017年12月14日 16:50:13 -0800

On Thu, Dec 14, 2017 at 4:29 PM Yury Selivanov <[email protected]>
wrote:
> On Thu, Dec 14, 2017 at 7:03 PM, Guido van Rossum <[email protected]>
> wrote:
> My motivation to add the slot wasn't the performance: it's just not
> possible to have a class-level __getitem__ on types defined in C. The
> only way is to define a base class in C and then extend it in
> pure-Python. This isn't too hard usually, though.
This could potentially make it much more complicated to adding typing
support to NumPy. numpy.ndarray is defined in C.
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