Hi Ludovic, <br>
<br>
probably the prefix path you are using is wrong. Try with '/usr/local/'
or check where qgis bins and libraries are located and adjust the
prefix path accordingly.<br>
<br>
Regards, <br>
<br>
Germán<br><br><div class="gmail_quote">2012/8/25 ludo <span dir="ltr"><<a href="mailto:ludovic.granjon@wanadoo.fr" target="_blank">ludovic.granjon@wanadoo.fr</a>></span><br><blockquote class="gmail_quote" style="border-left:1px solid rgb(204,204,204);margin:0pt 0pt 0pt 0.8ex;padding-left:1ex">
<p>Hi</p>
<p>Yes you are right, I forgot the title I'm sorry</p>
<p>I try your code on monday and I tell you</p>
<p>Thanks</p>
<p> </p>
<p>Ludovic<br> <br> <br> <br><br></p>
<blockquote style="border-left:2px solid rgb(255,0,0);padding-left:5px;margin-left:5px">> Message du 24/08/12 19:09<br>> De : "Tim Sutton" <br>> A : "ludo" <br>> Copie ŕ : <a href="mailto:qgis-developer@lists.osgeo.org" target="_blank">qgis-developer@lists.osgeo.org</a><br>
> Objet : Re: [Qgis-developer] Python ogr driver issue (was ----> (no subject))<div class="im"><br>> <br>> Hi (adding a proper subject line to your messages is always nice)<br>> <br></div><div><div class="h5">
> On Fri, Aug 24, 2012 at 12:09 PM, ludo wrote:<br>> > Hi all<br>> ><br>> > I try to start the developpement for a custom application with qgis, so I<br>> > try simple things like add a vector layer but I have some problems. In a<br>
> > python console when I try to do something like that :<br>> ><br>> >>>> core.QgsApplication.setPrefixPath('/usr',True)<br>> >>>> core.QgsApplication.initQgis()<br>> >>>> l = core.QgsVectorLayer('/home/ludo/data/test.shp', 'test', 'ogr')<br>
> >>>> l.isValid()<br>> ><br>> > I always have a False result<br>> ><br>> > But if I try in the python console of qgis :<br>> ><br>> >>>> l = QgsVectorLayer('/home/ludo/data/test.shp', 'test', 'ogr')<br>
> >>>> l.isValid()<br>> ><br>> > The result is True<br>> ><br>> > Is someone have an idea ? Are there any other documentation that<br>> > <a href="http://qgis.org/pyqgis-cookbook/" target="_blank">http://qgis.org/pyqgis-cookbook/</a><br>
> <br>> <br>> There is a growing set of python unit tests that you can consult for ideas.<br>> <br>> Providiing the stdout from your console might help us to understand<br>> where your problem originates. Here is a little sript I often use:<br>
> <br>> -----------------------------------------------------------------<br>> <br>> import os<br>> import sys<br>> from qgis.core import QgsApplication, QgsProviderRegistry<br>> <br>> myUseDefaultPathFlag = True<br>
> QGISAPP.setPrefixPath('/usr', myUseDefaultPathFlag)<br>> QGISAPP.initQgis()<br>> s = QGISAPP.showSettings()<br>> print s<br>> r = QgsProviderRegistry.instance()<br>> if not 'ogr' in r.providerList():<br>
> print 'Could not find OGR provider!'<br>> else:<br>> print 'Providers found ok!'<br>> <br>> -----------------------------------------------------------------<br>> <br>> Hope that helps!<br>
> <br>> <br>> Tim<br>> ><br>> > Thanks a lot<br>> ><br>> > Ludovic<br>> > _______________________________________________<br>> > Qgis-developer mailing list<br>> > <a href="mailto:Qgis-developer@lists.osgeo.org" target="_blank">Qgis-developer@lists.osgeo.org</a><br>
> > <a href="http://lists.osgeo.org/mailman/listinfo/qgis-developer" target="_blank">http://lists.osgeo.org/mailman/listinfo/qgis-developer</a><br>> ><br>> <br>> <br>> <br>> -- <br>> Tim Sutton - QGIS Project Steering Committee Member (Release Manager)<br>
> ==============================================<br>> Please do not email me off-list with technical<br>> support questions. Using the lists will gain<br>> more exposure for your issues and the knowledge<br>> surrounding your issue will be shared with all.<br>
> <br>> Visit <a href="http://linfiniti.com" target="_blank">http://linfiniti.com</a> to find out about:<br>> * QGIS programming and support services<br>> * Mapserver and PostGIS based hosting plans<br>> * FOSS Consulting Services<br>
> Skype: timlinux<br>> Irc: timlinux on #qgis at <a href="http://freenode.net" target="_blank">freenode.net</a><br>> ==============================================<br>> </div></div></blockquote><br>_______________________________________________<br>
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