Thank you, Nyall. That works.
Simon
Am 05.06.2025 01:23, schrieb Nyall Dawson:
On Mon, 2 Jun 2025 at 19:16, Simon Gröchenig via QGIS-Developer
<[email protected]> wrote:
Hi,
how can I remove a layer variable with Python?
The following returns true, but does not work.
QgsExpressionContextUtils.layerScope(layer).removeVariable("variable_name")
That's cos it's just removing the variable from a copy of the layer's
expression context scope, not from the layer itself.
It's rather gross, but try
https://qgis.org/pyqgis/3.40/core/QgsExpressionContextUtils.html#qgis.core.QgsExpressionContextUtils.setLayerVariables
-- you'll need to first retrieve the existing variables via
https://qgis.org/pyqgis/3.40/core/QgsExpressionContextUtils.html#qgis.core.QgsExpressionContextUtils.layerScope
and then build a dictionary of the variables you want to keep by
iterating over
https://qgis.org/pyqgis/3.40/core/QgsExpressionContextScope.html#qgis.core.QgsExpressionContextScope.variableNames
Hope that helps!
Nyall
Best regards
Simon
_____________________
Simon Gröchenig
GIS Support und Training
Treffling 73 - 9871 Seeboden - Österreich
Tel.: +43 699 11 22 31 22
Web: https://www.sgroe.at
E-Mail: [email protected]
_______________________________________________
QGIS-Developer mailing list
[email protected]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
--
_____________________
Simon Gröchenig
GIS Support und Training
Treffling 73 - 9871 Seeboden - Österreich
Tel.: +43 699 11 22 31 22
Web: https://www.sgroe.at
E-Mail: [email protected]
_______________________________________________
QGIS-Developer mailing list
[email protected]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
