[gdal-dev] python bindings: strange behavior with layer

[Python Gis]

Thanks Luke
this is exactly the approach I have used, solving the issue
To me looks strange that a layer can't exist without the datasource in the 
scope, with other GIS API is not so.
But anyway, good to know
best regards



----- Original Message ----
From: "Pinner, Luke" <Luke.Pinner at environment.gov.au>
To: Python Gis <pygis2010 at yahoo.com>
Cc: gdal-dev at lists.osgeo.org
Sent: Thu, July 22, 2010 1:21:23 AM
Subject: RE: [gdal-dev] python bindings: strange behavior with layer

The datasource "ds" is still going out of scope as it is local to your
"getLayer2" function.
Lots of ways to avoid this. Try not wrapping it up in a function, or
return a tuple of datasource and layer e.g.

def getDSandLayer(shape_fullname):
    ds = ogr.Open(shape_fullname, 0)
    layer = ds.GetLayer(0)
    print 'Name from method: %s' % layer.GetName()
    return ds,layer;

ds,layer = getLayer2('output/myshape.shp')
print 'Name from main: %s' % layer.GetName()

Luke


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