I've updated the MemoryLayerSaver plugin to fix this. Basically the problem comes from (I believe) the SIP wrapping around QgsFeature attributes. So for a feature feat with a field 'f',
feat.f=None value=feat.f print type(value) prints PyQtNullVariant. The same result (expected in this case) if the first line is feat.f=NULL. I've got around this in the MemoryLayerSaver by not setting the value at all if the required value is None. This works as when a feature is created all the attributes are None - they just can't be set to that value as far as I can see (through the python API that is..) Cheers Chris ________________________________________ From: Régis Haubourg [regis.haubo...@eau-adour-garonne.fr] Sent: 02 February 2014 04:03 To: qgis-developer@lists.osgeo.org Subject: Re: [Qgis-developer] EasyCustomLabeling ported to QGIS 2.0 Just a followup, when restoring a memory layer thanks to memory layer saver, we got QpyNullVariant objects, when we had NoneType object on memory layer's creation. Updating the values to None restore the unpinned labels. Just use this layer.changeAttributeValue(myFeatureId, myfieldId, None) I will try to patch memory Layers Saver for this, since I assume some other side effects with memory layers are expectable Régis. -- View this message in context: http://osgeo-org.1560.x6.nabble.com/EasyCustomLabeling-ported-to-QGIS-2-0-tp5101254p5101354.html Sent from the Quantum GIS - Developer mailing list archive at Nabble.com. This message contains information, which is confidential and may be subject to legal privilege. If you are not the intended recipient, you must not peruse, use, disseminate, distribute or copy this message. If you have received this message in error, please notify us immediately (Phone 0800 665 463 or i...@linz.govt.nz) and destroy the original message. LINZ accepts no responsibility for changes to this email, or for any attachments, after its transmission from LINZ. Thank You. _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer