Attribute Error: 'NoneType' object has no attribute 'name'

Question

I am developing a plugin that counts the number of features for a layer in QGIS 2.6. The plugin works fine when there is a layer but when there is no layer, it throws an error. For reference, a part of the code is also attached.

def run(self):
    """Run method that performs all the real work"""
    # show the dialog
    self.dlg.show()

    layers = QgsMapLayerRegistry.instance().mapLayers().values()
    for layer in layers:
        if layer.type() == QgsMapLayer.VectorLayer:
            self.dlg.featurecombo.addItem( layer.name(), layer )
    # Run the dialog event loop
    result = self.dlg.exec_()
    # See if OK was pressed
    if result  == 1:
        index = self.dlg.featurecombo.currentIndex()
        layer = self.dlg.featurecombo.itemData(index)
        if layer > 0:
            QMessageBox.information(self.iface.mainWindow(), "feature count","%s has %d features." %(layer.name(), layer.featureCount()))

enter image description here

Your code is indicating that "name" does not exist in the object you are looping through. Try: import pprint and then in your loop: pprint.pprint(layer). This should help verify that "name" exists. Does it? — Mr. Concolato
– Mr. Concolato, Commented Jan 6, 2015 at 20:40
I made a change in the looping when there is no layer. That works. Thanks for the response. — User123
– User123, Commented Jan 7, 2015 at 5:02

Mr. Concolato · Accepted Answer · 2015-01-07 11:33:55Z

2

Your code is indicating that "name" does not exist in the object you are looping through. Try: import pprint and then in your loop: pprint.pprint(layer).

If layer does not exist, then you will know what is causing your error and what items in your object are available for parsing.

Stay curious my friend.

answered Jan 7, 2015 at 11:33

Mr. Concolato

5161 gold badge5 silver badges10 bronze badges

Yeah edited the code and now it works fine.Thanks.

User123
– User123

2015-01-07 12:31:47 +00:00
Commented Jan 7, 2015 at 12:31

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