[QGIS-Developer] Algorithms in python

[Nyall Dawson]

On Mon, 4 Oct 2021 at 22:34, Alessandro Pasotti <apasotti at gmail.com> wrote:
>
>
> On Mon, Oct 4, 2021 at 2:26 PM matteo <matteo.ghetta at gmail.com> wrote:
>>
>> Hi devs,
>>
>> recently I've made a PR to add an algorithm to the core, written in python:
>>
>> https://github.com/qgis/QGIS/pull/44680
>>
>> from the comments I get that from now on additional algorithms are
>> accepted only in C++ and not in python anymore.
>>
>> Is this an official statement?
>
>
> Yes, kind of: many developers (myself included) agree to that.

I'd say it's official, given that both @alexbruy and myself (who
currently maintain most of this code) agree. that it's the way we want
to see things go forward.

>
>>
>> My super personal opinion: while I perfectly understand devs position on
>> C++, I think we might miss some useful contributions from python only
>> devs (like me :) ) and we lack of a "straight" way to add useful
>> algorithms to QGIS.
>>
>> I see 2 options:
>>
>> * development of Processing plugins with algorithms that can lead to
>> many plugins and difficulties to find them
>> * have a "straight" way to add additional algorithms to QGIS, like the
>> "Download scripts from collections" of QGIS 2
>>
>> What is a general opinion about this topic?
>
>
> I don't know about "general" but we do have the resource sharing plugin (not sure about the current status of it though) and a "standard" python plugin would also allow us to distribute processing plugins.

+1 for a standard python plugin.

If it's something you feel should definitely be available in qgis
installs, then I'd say making the python version as a prototype and
then opening a feature request for a c++ port is a good approach. Both
Alex Bruy and myself have a history of adopting tickets like this and
porting useful tools on a voluntary basis!

Nyall


>
> Kind regards.
>
> --
> Alessandro Pasotti
> QCooperative:  www.qcooperative.net
> ItOpen:   www.itopen.it
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