[Qgis-developer] Looping over features in processing

[Victor Olaya]

Tim

What you are describing is the behaviour of the iterative execution of
algorithms (for a layer with n features, it runs the algorihtm n times,
each of them using as input a layer with only one of those features). That
can be executed without the need to code anything, from the algorithm
dialog.

If it's not exactly what you are looking for and you want to code something
similar, maybe you can at least check the corresponding code to get some
ideas

https://github.com/qgis/QGIS/blob/master/python/plugins/processing/gui/AlgorithmExecutor.py#L58

Let me know if you have more questions

Cheers



2015-07-23 20:15 GMT+02:00 Tim Sutton <tim at qgis.org>:

> Hi all
>
> Is it possible to write loops in processing. I’d like to do stuff like
> iterate over each poly in a polygon layer, clip features from a few layers
> and write them to a subfolder whose name is based on the name of the
> polygon layer. Think of it like atlas but for data not for print
> compositions. Has anyone done something similar?
>
> Regards
>
> Tim
>
>
>
>
> Tim Sutton
> QGIS Project Steering Committee Member
> tim at qgis.org
>
>
>
>
>
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