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I have the code :
from qgis.core import QgsMapLayerRegistry
vl = QgsMapLayerRegistry.instance().mapLayersByName('pl')[0]
iface.setActiveLayer(vl)
When I type in console after loading QGIS, no error. But, when I put the code in startup.py, so automatically QGIS will execute the code in startup.py, I get error. The error : "list index out of range"
What is wrong for the code?
You probably need to preliminarily import the layer before calling it.
If pl is a shapefile:
from qgis.core import *
layer = QgsVectorLayer('C:/Users/path_to_shapefile/vector_layer.shp', 'pl' , "ogr")
QgsMapLayerRegistry.instance().addMapLayer(layer)
vl = QgsMapLayerRegistry.instance().mapLayersByName('pl')[0]
iface.setActiveLayer(vl)
If pl is a raster:
from qgis.core import *
layer = QgsRasterLayer('C:/Users/path_to_raster/raster_layer.tif', 'pl')
QgsMapLayerRegistry.instance().addMapLayer(layer)
vl = QgsMapLayerRegistry.instance().mapLayersByName('pl')[0]
iface.setActiveLayer(vl)
startup.py script, it is probably best to define a function which loads the layers and run this function when QGIS has finished the initialisation process as was asked in this post. Otherwise the annoying notification message appears :)