On Tue, 26 Nov 2019 at 07:11, Cliff Patterson <[email protected]> wrote: > > When trying to add a script to the processing toolbox, I get the following > error (below) even though iface is imported with "from qgis.utils import > iface" in the script. The problem existed with QGIS 3.6 so I upgraded to 3.10 > on Windows 10, but it persists, I am using the standalone installer. Any > ideas how I can fix this error?
You should avoid using iface in processing algorithms, for a number of reasons: 1. It's not thread safe, and processing algorithms run in a background thread by default 2. It's not available everywhere processing can be used The addVectorLayer method exposed to iface is really just a simple convenience wrapper, and you can achieve the same results by loading a vector layer using QgsVectorLayer api. Nyall > iface.addVectorLayer(uri, 'Asset Data', 'ogr') > NameError: name 'iface' is not defined > > > Python version: 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 > 64 bit (AMD64)] > QGIS version: 3.10.0-A Coruña A Coruña, 6ffa89eb3e > > Python Path: > > C:/PROGRA~1/QGIS3~1.10/apps/qgis/./python > C:/Users/Cliff/AppData/Roaming/QGIS/QGIS3\profiles\default/python > C:/Users/Cliff/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins > C:/PROGRA~1/QGIS3~1.10/apps/qgis/./python/plugins > C:\Program Files\QGIS 3.10\bin\python37.zip > C:\PROGRA~1\QGIS3~1.10\apps\Python37\DLLs > C:\PROGRA~1\QGIS3~1.10\apps\Python37\lib > C:\Program Files\QGIS 3.10\bin > C:\PROGRA~1\QGIS3~1.10\apps\Python37 > C:\PROGRA~1\QGIS3~1.10\apps\Python37\lib\site-packages > C:\PROGRA~1\QGIS3~1.10\apps\Python37\lib\site-packages\win32 > C:\PROGRA~1\QGIS3~1.10\apps\Python37\lib\site-packages\win32\lib > C:\PROGRA~1\QGIS3~1.10\apps\Python37\lib\site-packages\Pythonwin > C:/Users/Cliff/AppData/Roaming/QGIS/QGIS3\profiles\default/python > C:\Users\Cliff\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins > > > _______________________________________________ > Qgis-user mailing list > [email protected] > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
