[gdal-dev] Issue with python bindings.

[Frank Warmerdam]

Ivan Willig wrote:
> Hi list,
> I am having an issues with using the python swig based bindings. I am on 
> Fedora 13 using the default gdal rpm, which is at version 1.6.2. My 
> issue is when i stack method calls.  For example when I do the following: 
> 
> ogr.Open("/home/ivan/dev/bigapps/data/nyco.shp").GetLayer().GetFeature(0)
> 
> 
> I get a Segmentation fault. Here are the results of strace 
> http://paste.pocoo.org/show/281682/. What am I doing wrong? Should I 
> just hand compile a new version of gdal? Or is this not an advised usage 
> of the python bindings? A limitation in swig? Thanks for your help.

Ivan,

I believe the problem is object lifetimes.  Keep a reference to the
datasource around until you are done with the feature(s).

ds = ogr.Open("/home/ivan/dev/bigapps/data/nyco.shp")
feat = ds.GetLayer().GetFeature(0)
...
feat = None
ds = None

Best regards,
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