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Re: [Python-Dev] Dinamically set __call__ method

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Date Sat, 08 Nov 2014 11:49:17 -0800
From Ethan Furman <ethan@stoneleaf.us>
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Subject Re: [Python-Dev] Dinamically set __call__ method
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On 11/07/2014 10:50 PM, dieter wrote:
> Ethan Furman <ethan@stoneleaf.us> writes:
>
>> On 11/06/2014 10:59 PM, dieter wrote:
>>> John Ladasky writes:
>>>> On Tuesday, November 4, 2014 11:12:31 AM UTC-8, Ethan Furman wrote:
>>>>
>>>>> If you really absolutely positively have to have the signature be correct for each instance, you may to either look at a
>>>>> function creating factory, a class creating factory, or a meta-class.
>>>>
>>>> +1.  Overriding __call__() within the class definition, over and over again, with different function, looks awkward to me.
>>>
>>> A possibility to get the original approach implemented looks like:
>>>
>>>     make "__call__" a descriptor on the class which looks up the real
>>>     method on the instance.
>>
>> This still wouldn't get the signatrue correct, though.
>
> Why not? Once the descriptor is resolved, you get the final
> instance method - with the correct signature.

Hmmm... well, it wouldn't be correct on a class lookup, but, yeah, it would be correct for an instance lookup -- and 
maybe that's good enough for the OP.

--
~Ethan~

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Thread

Re: [Python-Dev] Dinamically set __call__ method Ethan Furman <ethan@stoneleaf.us> - 2014-11-04 11:12 -0800
  Re: [Python-Dev] Dinamically set __call__ method John Ladasky <john_ladasky@sbcglobal.net> - 2014-11-06 12:21 -0800
    Re: [Python-Dev] Dinamically set __call__ method dieter <dieter@handshake.de> - 2014-11-07 07:59 +0100
    Re: [Python-Dev] Dinamically set __call__ method Ethan Furman <ethan@stoneleaf.us> - 2014-11-07 04:58 -0800
    Re: [Python-Dev] Dinamically set __call__ method dieter <dieter@handshake.de> - 2014-11-08 07:50 +0100
    Re: [Python-Dev] Dinamically set __call__ method Ethan Furman <ethan@stoneleaf.us> - 2014-11-08 11:49 -0800
      Re: [Python-Dev] Dinamically set __call__ method Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-11-09 11:31 +1300
        Re: [Python-Dev] Dinamically set __call__ method Ethan Furman <ethan@stoneleaf.us> - 2014-11-08 19:27 -0800
          Re: [Python-Dev] Dinamically set __call__ method Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-11-10 00:38 +1300
            Re: [Python-Dev] Dinamically set __call__ method Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-10 00:14 +1100
            Re: [Python-Dev] Dinamically set __call__ method Ethan Furman <ethan@stoneleaf.us> - 2014-11-09 12:16 -0800
        Re: [Python-Dev] Dinamically set __call__ method Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-11 00:43 -0700
        Re: [Python-Dev] Dinamically set __call__ method Fabio Zadrozny <fabiofz@gmail.com> - 2014-11-12 13:33 -0200
          Re: [Python-Dev] Dinamically set __call__ method Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-11-13 17:20 +1300
            Re: [Python-Dev] Dinamically set __call__ method Fabio Zadrozny <fabiofz@gmail.com> - 2014-11-13 11:38 -0200
        Re: [Python-Dev] Dinamically set __call__ method Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-12 11:58 -0700

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