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Try moving the setExtent() call on the QgsMapSettings object inside your loop and pass the bounding box of the current feature's geometry on each iteration: def finished(): img = render.renderedIm …

To set the native selection tools found in the Selection Toolbar, you can just programmatically trigger their actions. So, in a plugin (where the iface object is an instance attribute referenced as se …

How do I use the ‘maximum’ aggregates function as an expression with PyQGIS code? …

Probably the call you are missing is layer.triggerRepaint() Try: style_path = r'Path\to\style_file.qml' lyr = iface.activeLayer() lyr.loadNamedStyle(style_path) lyr.triggerRepaint() # update legen …

project') else: layer = layers[0]# assign the first item in the list to the layer variable # define the output path fn = 'C:\\Users\\CMCA\\OneDrive - Boskalis\\Documents\\Trial PyQGIS …

The problem here is that you are modifying the layer tree in the processAlgorithm() method of a processing script, which is not thread safe. This is why QGIS is crashing. This section of the docs give …

You can use the excellent features QgsTask and QgsTaskManager for this. There are a few options for running tasks in background threads in this way. These are detailed here in the documentation. Bel …

Here's a working snippet for creating some label settings and labelling with an expression for PyQGIS 3: # Define layer object layer = QgsProject().instance().mapLayersByName('Name_of_your_layer')[0 …

Regarding the question: "do I need to use is_child_algorithm=True?", you need to use it if the algorithm you are running is being run as a child or sub-algorithm, if you like, inside the processAlgori …

Those methods of QgsVectorLayerUtils also take into account the edit state of the layer, as well as the provider capabilities etc. You can see the logic used in the source code for the QgsVectorLayerU …

Here is a minimal example of how to access layer tree objects such as QgsLayerTreeLayer or QgsLayerTreeGroup. These inherit the method setExpanded() from the QgsLayerTreeNode base class. So you can do …

Make sure you are catching the feature object which is passed by the featureIdentified signal, and using it when you define your self.identify slot function like this: def identify(self, feat): g …

The main problem I see is that the result of your function is two print statements which will just be printed to the console. In order to use those values you need to return them from your function. …

Without testing your entire script, the problem you describe is because feat = next(polygon.getFeatures()) is only storing the first feature, therefore subsequent references to feat are acting on the …

This is the second time I've come across this code example in the last week. At least you included a link to the origin source; now I know where it's come from. I think the main problem you have is th …