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Tell me please how to get the layer by name

QGIS 3.0

closed as unclear what you're asking by tinlyx, whyzar, aldo_tapia, ahmadhanb, nmtoken Apr 10 '18 at 19:23

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I get layer by name in that way in QGIS3:

layer_list = QgsProject.instance().layerTreeRoot().children() # returns QgsLayerTreeNode object list
layer = [lyr.layer() for lyr in layer_list if lyr.name()=="LAYER_NAME"][0]

print(layer)
# OUT: <qgis._core.QgsVectorLayer object at ...>

I don't know if there is a shorter way. Maybe.

But in that way, you can get first layer named "LAYER_NAME". children() function doesn't return layers in a group layer.

EDIT: the shortest way of getting layer by name:

layers = QgsProject.instance().mapLayersByName('LAYER_NAME') # list of layers named LAYER_NAME
layer = layers[0] # first layer named LAYER_NAME.

If you are sure there is one "LAYER_NAME" then:

layer = QgsProject.instance().mapLayersByName('LAYER_NAME')[0]
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listLayers=QgsProject.instance().mapLayersByName('layername')

Retrieve a list of matching registered layers by layer name.

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