Re: [Qgis-user] Select QGSFeature with given ID
Hello Etienne, wonderful. A lot of great tipps at least to review own code. I have seen it before and the method .setSubsetOfAttributes has saved me minutes of calculation times :) pat Gesendet: Freitag, 20. Oktober 2017 um 08:39 Uhr Von: "Etienne Trimaille" An: "Pat Hin" Cc: rich...@duif.net, "qgis-userlists.osgeo.org" Betreff: Re: [Qgis-user] Select QGSFeature with given ID Have a look at this good blog post from Nyall with QgsFeatureRequest: http://nyalldawson.net/2016/10/speeding-up-your-pyqgis-scripts/ 2017-10-20 8:21 GMT+02:00 Pat Hin <ph...@gmx.de>: Hello many thanks. the method ".setFilterExpression" has been the one i am looking for :) Many thanks :) Pat Gesendet: Donnerstag, 19. Oktober 2017 um 20:39 Uhr Von: "Richard Duivenvoorde" <rdmaili...@duif.net> An: "Pat Hin" <ph...@gmx.de>, "Luigi Pirelli" <lui...@gmail.com> Cc: "qgis-userlists.osgeo.org" <qgis-user@lists.osgeo.org> Betreff: Re: [Qgis-user] Select QGSFeature with given ID On 19-10-17 18:27, Pat Hin wrote: > Thank you > > i have done it but struggeld. but wil have a second try Did you found http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/ already? http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/vector.html#iterating-over-a-subset-of-features Regards, Richard Duivenvoorde ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Select QGSFeature with given ID
Have a look at this good blog post from Nyall with QgsFeatureRequest: http://nyalldawson.net/2016/10/speeding-up-your-pyqgis-scripts/ 2017-10-20 8:21 GMT+02:00 Pat Hin : > Hello > > many thanks. > > the method ".setFilterExpression" has been the one i am looking for :) > > Many thanks :) > > Pat > > *Gesendet:* Donnerstag, 19. Oktober 2017 um 20:39 Uhr > *Von:* "Richard Duivenvoorde" > *An:* "Pat Hin" , "Luigi Pirelli" > *Cc:* "qgis-userlists.osgeo.org" > *Betreff:* Re: [Qgis-user] Select QGSFeature with given ID > On 19-10-17 18:27, Pat Hin wrote: > > Thank you > > > > i have done it but struggeld. but wil have a second try > > Did you found > > http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/ > > already? > > http://docs.qgis.org/testing/en/docs/pyqgis_developer_ > cookbook/vector.html#iterating-over-a-subset-of-features > > Regards, > > Richard Duivenvoorde > > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Select QGSFeature with given ID
Hello many thanks. the method ".setFilterExpression" has been the one i am looking for :) Many thanks :) Pat Gesendet: Donnerstag, 19. Oktober 2017 um 20:39 Uhr Von: "Richard Duivenvoorde" An: "Pat Hin" , "Luigi Pirelli" Cc: "qgis-userlists.osgeo.org" Betreff: Re: [Qgis-user] Select QGSFeature with given ID On 19-10-17 18:27, Pat Hin wrote: > Thank you > > i have done it but struggeld. but wil have a second try Did you found http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/ already? http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/vector.html#iterating-over-a-subset-of-features Regards, Richard Duivenvoorde ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Select QGSFeature with given ID
On 19-10-17 18:27, Pat Hin wrote: > Thank you > > i have done it but struggeld. but wil have a second try Did you found http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/ already? http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/vector.html#iterating-over-a-subset-of-features Regards, Richard Duivenvoorde ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Select QGSFeature with given ID
Thank you i have done it but struggeld. but wil have a second try thanks Gesendet: Donnerstag, 19. Oktober 2017 um 18:14 Uhr Von: "Luigi Pirelli" An: "Pat Hin" Cc: "qgis-userlists.osgeo.org" Betreff: Re: [Qgis-user] Select QGSFeature with given ID explore documentation about QgsFreatureRequest QgsVectorLayer.getFeatures(QgsFreatureRequest(...)) regards Luigi Pirelli ** * Boundless QGIS Support/Development: lpirelli AT boundlessgeo DOT com * LinkedIn: https://www.linkedin.com/in/luigipirelli * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli * GitHub: https://github.com/luipir * Mastering QGIS 2nd Edition: * https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition ** On 19 October 2017 at 15:45, Pat Hin wrote: > Hello, > > i have a vector layer with more than 25k QGSFeature elements in it. > By now i run over it by a loop and stop at the Feature with the given ID. > But i know this amateurish and worser very slow if i need to run for it > several times. > So how could i do this more elegant and faster? > > Many thanks > Pat > > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Select QGSFeature with given ID
explore documentation about QgsFreatureRequest QgsVectorLayer.getFeatures(QgsFreatureRequest(...)) regards Luigi Pirelli ** * Boundless QGIS Support/Development: lpirelli AT boundlessgeo DOT com * LinkedIn: https://www.linkedin.com/in/luigipirelli * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli * GitHub: https://github.com/luipir * Mastering QGIS 2nd Edition: * https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition ** On 19 October 2017 at 15:45, Pat Hin wrote: > Hello, > > i have a vector layer with more than 25k QGSFeature elements in it. > By now i run over it by a loop and stop at the Feature with the given ID. > But i know this amateurish and worser very slow if i need to run for it > several times. > So how could i do this more elegant and faster? > > Many thanks > Pat > > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Select QGSFeature with given ID
Hello, i have a vector layer with more than 25k QGSFeature elements in it. By now i run over it by a loop and stop at the Feature with the given ID. But i know this amateurish and worser very slow if i need to run for it several times. So how could i do this more elegant and faster? Many thanks Pat ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
