Fixed syntax.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>

py_tools_ds/geo/raster/conversion.py

@@ -54,7 +54,8 @@ def raster2polygon(array, gt, prj, DN2extract=1, exact=True, maxfeatCount=None,
         # downsample with nearest neighbour
         zoom_factor = (8000 * 8000 / array.size) ** 0.5
         array, gt, prj = warp_ndarray(array, gt, prj,
-                                      out_gsd=(gt[1] / zoom_factor, gt[5] / zoom_factor),
+                                      out_gsd=(gt[1] / zoom_factor,
+                                               gt[5] / zoom_factor),
                                       rspAlg='near',
                                       q=True)
 
@@ -85,7 +86,11 @@ def raster2polygon(array, gt, prj, DN2extract=1, exact=True, maxfeatCount=None,
             if progress and not q else Timer(timeout, use_as_callback=True) if timeout else None
 
         # run the algorithm
-        status = gdal.Polygonize(src_band, src_band.GetMaskBand(), mem_layer, 0, ["8CONNECTED=8"] if exact else [],
+        status = gdal.Polygonize(src_band,
+                                 src_band.GetMaskBand(),
+                                 mem_layer,
+                                 0,
+                                 ["8CONNECTED=8"] if exact else [],
                                  callback=callback)
 
         # handle exit status other than 0 (fail)
@@ -95,6 +100,9 @@ def raster2polygon(array, gt, prj, DN2extract=1, exact=True, maxfeatCount=None,
                 raise TimeoutError('raster2polygon timed out!')
             raise Exception(errMsg)
 
+    except KeyboardInterrupt:
+        raise TimeoutError('raster2polygon timed out!')
+
     # extract polygon
     mem_layer.SetAttributeFilter('DN = %s' % DN2extract)