Fixed deprecation warning.

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

py_tools_ds/io/raster/gdal.py

@@ -89,11 +89,11 @@ def get_GDAL_driverList():
         if drv.GetMetadataItem(gdal.DCAP_RASTER):
             meta = drv.GetMetadataItem(gdal.DMD_EXTENSIONS)
             extensions = meta.split() if meta else []
-            df.ix[i] = [drv.GetDescription(),
-                        drv.GetMetadataItem(gdal.DMD_LONGNAME),
-                        extensions[0] if len(extensions) > 0 else np.nan,
-                        extensions[1] if len(extensions) > 1 else np.nan,
-                        extensions[2] if len(extensions) > 2 else np.nan]
+            df.loc[i] = [drv.GetDescription(),
+                         drv.GetMetadataItem(gdal.DMD_LONGNAME),
+                         extensions[0] if len(extensions) > 0 else np.nan,
+                         extensions[1] if len(extensions) > 1 else np.nan,
+                         extensions[2] if len(extensions) > 2 else np.nan]
     df = df.dropna(how='all')
     return df