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Which is the runalg method in QGIS API?
To do so, you can use QGIS API commands, or, even easier, use one of the handy methods provided for such tasks. The runalg method returns a dictionary with the output names (the ones shown in the algorithm description) as keys and the file paths of those outputs as values.
How is runalg method used to load layers?
The runalg method returns a dictionary with the output names (the ones shown in the algorithm description) as keys and the file paths of those outputs as values. You can load those layers by passing the corresponding file paths to the load () method.
Is there a way to run QGIS from toolbox?
If ran from toolbox, this works fine, because you can tick the “Open output file after running algorithm” box. Looking at the source code for QGIS, the code for loading the memory layer seems to be defined in the function Postprocessing.handleAlgorithmResults.
How to pass a string to a QGIS object?
Simply use a string with the name that identifies the data object to use (the name it has in the QGIS Table of Contents) or a filename (if the corresponding layer is not opened, it will be opened but not added to the map canvas). If you have an instance of a QGIS object representing the layer, you can also pass it as parameter.
Is there a processing console in QGIS Python?
There is not a processing console in QGIS, but all processing commands are available instead from the QGIS built-in Python console. That means that you can incorporate those commands into your console work and connect processing algorithms to all the other features (including methods from the QGIS API) available from there.
How to enumerate a layer in QGIS table of contents?
Simply use a string with the name that identifies the data object to use (the name it has in the QGIS Table of Contents) or a filename (if the corresponding layer is not opened, it will be opened but not added to the map canvas). If you have an instance of a QGIS object representing the layer, you can also pass it as parameter. Enumeration.
Can a proccesing console be used in QGIS?
There is not a proccesing console in QGIS, but all processing commands are available instead from the QGIS built-in Python console. That means that you can incorporate those commands into your console work and connect processing algorithms to all the other features (including methods from the QGIS API)…
Can a processing script extend a qgsprocessingalgorithm?
Processing scripts extend QgsProcessingAlgorithm, so you need to add some extra lines of code to implement mandatory functions.