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I'm following the book 'Geoprocessing with python', and I'm just trying to filter countries by their continent with this code:

from osgeo import ogr
import ospybook as pb
fn = os.path.join(data_dir, 'ne_10m_admin_0_countries')
ds = ogr.Open(fn)
lyr = ds.GetLayer('ne_10m_admin_0_countries')
lyr.SetAttributeFilter('CONTINENT = "Asia"')

I can open and read the file with all the attributes, but when I try to use the SetAttributeFilter with Asia for example , I always get the answer:

ERROR 1: "Asia" not recognised as an available field.

I've tried this with diffrent shapefiles and always get the same error.

1 Answer 1

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I simply swapped the single/double quotes in

lyr.SetAttributeFilter('CONTINENT = "Asia"')

So, the correct syntax is

lyr.SetAttributeFilter("CONTINENT = 'Asia' ")

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