Getting attributes of selected features using PyQGIS

Question

Could anybody provide an example how to get the attributes of selected features?

I tried the following code in the Python Console : but I'm stuck at the point where I'd like to get the attributes:

from qgis.utils import iface
canvas = iface.mapCanvas()
cLayer = canvas.currentLayer()
selectList = []
if cLayer:
    count = cLayer.selectedFeatureCount()
    print (count)
    selectedList = layer.selectedFeaturesIds()
for f in selectedList:
    # This is where I'm stuck
    # As I don't know how to get the Attributes of the features

Answer 1

This will work:

layer = iface.activeLayer()
features = layer.selectedFeatures()
for f in features:
    print f.attributeMap()

In PyQGIS 3:

layer = iface.activeLayer()
features = layer.selectedFeatures()
for f in features:
    # refer to all attributes
    print (f.attributes()) # results in [3, 'Group 1', 4.6]
for f in features:
    # refer to a specific values of a field index
    print(f.attribute(1)) # results in Group 1

Answer 2

For QGIS 3.10

Not sure if this post was asking for it in a list...

Print field of selected features

layer = iface.activeLayer()
for feature in layer.selectedFeatures():
    print(feature['field name'])

Create list of selected features

layer = iface.activeLayer()
list = []
for feature in layer.selectedFeatures():
    list.append(feature['field'])
print(list)

Answer 3

There are also other approaches available:

Approach 1 : QgsAggregateCalculator with ArrayAggregate

Available aggregates to calculate.

Not all aggregates are available for all field types.

This approach is available since QGIS 2.16.

layer = iface.activeLayer()
creates a memory layer of original layer exclusively with all selected features in it
temp_layer = layer.materialize(QgsFeatureRequest().setFilterFids(layer.selectedFeatureIds()))
specify your target field
result = temp_layer.aggregate(QgsAggregateCalculator.ArrayAggregate, "your_field")[0]
prints an output list
print(result)

Approach 2 : QgsVectorLayerUtils

Contains utility methods for working with QgsVectorLayers.

This approach is available since QGIS 3.

layer = iface.activeLayer()
creates a memory layer of original layer exclusively with all selected features in it
temp_layer = layer.materialize(QgsFeatureRequest().setFilterFids(layer.selectedFeatureIds()))
specify your target field
result = QgsVectorLayerUtils.getValues(temp_layer, "your_field")[0]
print an output list
print(result)

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References:

• Creating Vector layer from selected features with PyQGIS