[Qgis-user] reduce number of open files in pyqgis script

[Greg Troxel]

Martin Landa via QGIS-User <qgis-user at lists.osgeo.org> writes:

> for sublayer in layers:
>     name = sublayer.name()
>     layer = QgsVectorLayer(sublayer.uri(), 'ogr')
>
>     clipped_layer = clip_layer(layer, extent, layer.name())
>
>     del layer
>
>     print(name, open_files_count())
>     if clipped_layer.featureCount() == 0:
>         del clipped_layer
>         continue
>     clipped_layers.append(clipped_layer)
> """

I would suggest reading the gdal code to try to understand this.

Looking at your code above, I wonder if the layer returned by clip_layer
holds a reference to the first argument.  (This should be easy to
understand from code reading).