[QGIS-Developer] QgsVectorFileWriter for GeoJSON

[matteo]

Hi all,

I cannot export a layer as GeoJSON using a very simple syntax:

error = QgsVectorFileWriter.writeAsVectorFormat(layer=vl,
fileName="/home/matteo/Desktop/my_json.geojson",
driverName="GeoJSON")

I always get an error like:

TypeError: QgsVectorFileWriter.writeAsVectorFormat(): arguments did not
match any overloaded call:
  overload 1: 'driverName' is not a valid keyword argument
  overload 2: 'driverName' is not a valid keyword argument
  overload 3: 'driverName' is not a valid keyword argument

while with:

QgsVectorFileWriter.driverForExtension('.geojson') the output is:

'GeoJSON'

and from the documentation driverName seems to be a keyword argument:

https://qgis.org/pyqgis/master/core/QgsVectorFileWriter.html#qgis.core.QgsVectorFileWriter.writeAsVectorFormat

with "ESRI Shapefile" it works correctly.

Am I missing something?

Cheers and thanks for all the hints

Matteo