[Python-ideas] Async API: some code to review

[Guido van Rossum]

On Mon, Oct 29, 2012 at 12:24 PM, Andrew Svetlov
<andrew.svetlov at gmail.com> wrote:
> On Mon, Oct 29, 2012 at 8:10 PM, Guido van Rossum <guido at python.org> wrote:
[Andrew]
>>> I would to see add_{reader,writer} and call_{soon,later} accepting
>>> **kwargs as well as *args. At least to respect functions with
>>> keyword-only arguments.
>>
>> Hmm... I intentionally ruled those out because I wanted to leave the
>> door open for keyword args that modify the registration function
>> (add_reader etc.); it is awkward to require conventions like "your
>> function cannot have a keyword arg named X because we use that for our
>> own API" and it is even more awkward to have to retrofit new values of
>> X into that rule. Maybe we can come up with a simple wrapper.
>
> It can be solved easy with using names like __when, __callback etc.
> That names will never clutter with user provided kwargs I believe.

No, those names have different meaning inside a class (they would be
transformed into _<class>__when, where <class> is the name of the
*current* class textually enclosing the use). I am not closing the
door on this one but I'd have to see a lot more evidence that this
issue is widespread.

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