[Qgis-developer] (no subject)

[ludo]

Hi all

I try to start the developpement for a custom application with qgis, so I try simple things like add a vector layer but I have some problems. In a python console when I try to do something like that :

>>> core.QgsApplication.setPrefixPath('/usr',True)
>>> core.QgsApplication.initQgis()
>>> l = core.QgsVectorLayer('/home/ludo/data/test.shp', 'test', 'ogr')
>>> l.isValid()

I always have a False result

But if I try in the python console of qgis :

>>> l = QgsVectorLayer('/home/ludo/data/test.shp', 'test', 'ogr')
>>> l.isValid()

The result is True

Is someone have an idea ? Are there any other documentation that http://qgis.org/pyqgis-cookbook/

Thanks a lot

Ludovic
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