Subgroup: Processing
Class: QgsProcessingRegistry¶
-
class
qgis.core.
QgsProcessingRegistry
(parent: QObject = None)¶ Bases:
PyQt5.QtCore.QObject
Constructor for QgsProcessingRegistry.
Registry for various processing components, including providers, algorithms and various parameters and outputs.
QgsProcessingRegistry is not usually directly created, but rather accessed through
QgsApplication.processingRegistry()
New in version 3.0: Methods
addProvider
Add a processing provider to the registry. algorithmById
Finds an algorithm by its ID. algorithms
Returns a list of all available algorithms from registered providers. childEvent
connectNotify
createAlgorithmById
Creates a new instance of an algorithm by its ID. customEvent
disconnectNotify
isSignalConnected
providerById
Returns a matching provider by provider ID. providers
Get list of available providers. receivers
removeProvider
Removes a provider implementation from the registry (the provider object is deleted). sender
senderSignalIndex
timerEvent
Signals
providerAdded
Emitted when a provider has been added to the registry. providerRemoved
Emitted when a provider is removed from the registry [signal] Attributes
-
addProvider
(self, provider: QgsProcessingProvider) → bool¶ Add a processing provider to the registry. Ownership of the provider is transferred to the registry, and the provider’s parent will be set to the registry. Returns false if the provider could not be added (eg if a provider with a duplicate ID already exists in the registry). Adding a provider to the registry automatically triggers the providers
QgsProcessingProvider.load()
method to populate the provider with algorithms.See also
-
algorithmById
(self, id: str) → QgsProcessingAlgorithm¶ Finds an algorithm by its ID. If no matching algorithm is found, a None is returned.
See also
See also
-
algorithms
(self) → List[QgsProcessingAlgorithm]¶ Returns a list of all available algorithms from registered providers.
See also
-
childEvent
()¶
-
connectNotify
()¶
-
createAlgorithmById
(self, id: str, configuration: Dict[str, Any] = QVariantMap()) → QgsProcessingAlgorithm¶ Creates a new instance of an algorithm by its ID. If no matching algorithm is found, a None is returned. Callers take responsibility for deleting the returned object.
The
configuration
argument allows passing of a map of configuration settings to the algorithm, allowing it to dynamically adjust its initialized parameters and outputs according to this configuration. This is generally used only for algorithms in a model, allowing them to adjust their behavior at run time according to some user configuration.See also
See also
-
customEvent
()¶
-
disconnectNotify
()¶
-
isSignalConnected
()¶
-
providerAdded
¶ Emitted when a provider has been added to the registry. [signal]
-
providerById
(self, id: str) → QgsProcessingProvider¶ Returns a matching provider by provider ID.
-
providerRemoved
¶ Emitted when a provider is removed from the registry [signal]
-
providers
(self) → object¶ Get list of available providers.
-
receivers
()¶
-
removeProvider
(self, provider: QgsProcessingProvider) → bool¶ Removes a provider implementation from the registry (the provider object is deleted). Returns false if the provider could not be removed (eg provider does not exist in the registry).
See also
removeProvider(self, providerId: str) -> bool Removes a provider implementation from the registry (the provider object is deleted). Returns false if the provider could not be removed (eg provider does not exist in the registry).
See also
-
sender
()¶
-
senderSignalIndex
()¶
-
timerEvent
()¶
-