Greetings Devs,
I have a large number of shapefiles I need to process and have had limited
success using QGis 2.0.1 with it's python console.
// This works -
from osgeo import ogr
canvas =
qgis.utils.iface.mapCanvas()
allLayers = canvas.layers()
for i in allLayers: i.selectAll(); print i.name(); print
i.selectedFeatureCount()
// What I can't figure out is how to throw in a selection and then run Dissove
on it.
I've tried
for i in allLayers: i.selectAll(); print i.name();
i.getFeatures(QgsFeatureRequest().QgsExpression('LWFLAG <> "P" '); print
i.selectedFeatureCount()andselExp = QgsExpression('LWFLAG <> "P" ')for i in
allLayers: i.selectAll(); print i.name();
i.getFeatures(QgsFeatureRequest(selExp); print i.selectedFeatureCount()
andfor i in allLayers: i.selectAll(); print i.name();
i.getFeatures(QgsFeatureRequest('LWFLAG <> "P" ')); print
i.selectedFeatureCount()
and several other techniques all to no avail.
In PseudoCode:
from osgeo import ogrcanvas = qgis.utils.iface.mapCanvas()allLayers =
canvas.layers()for i in allLayers: i.select('LWFLAG <> "P" ');
print i.name(); print i.selectedFeatureCount(); i.dissolve("use
sel", i.name() + '_dis', "BLOCKGRP");
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