[Python-Dev] Please reject or postpone PEP 526

[Koos Zevenhoven]

On Sun, Sep 4, 2016 at 9:13 PM, Ivan Levkivskyi <levkivskyi at gmail.com> wrote:
> On 4 September 2016 at 19:59, Nick Coghlan <ncoghlan at gmail.com> wrote:
[...]
>>
>> Similarly, it would be reasonable to say that these three snippets
>> should all be equivalent from a typechecking perspective:
>>
>>     x = None # type: Optional[T]
>>
>>     x: Optional[T] = None
>>
>>     x: Optional[T]
>>     x = None
>
>
> Nice idea, explicit is better than implicit.
>

How is it going to help that these are equivalent within one checker,
if the meaning may differ across checkers?

-- Koos


> --
> Ivan
>
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