Exporting coordinates to CSV with 2 decimals using PyQGIS?

Question

I want to export a point-layer to a CSV using a plugin I am working on. Amongst other attributes, the coordinates are exported via layerOptions=['GEOMETRY=AS_XY']. Everything is working fine, however, I need the coordinates with only 2 decimals instead of the standard 10 for further processing in LaTeX.

Here's a minimum example of my code:

QgsVectorFileWriter.writeAsVectorFormat(layerPKT, QgsProject.instance().readPath("./")+'/KVZ_NEU.csv', "utf-8", layer.crs(), "CSV", True, layerOptions=['GEOMETRY=AS_XY'])

This is the output I get:

X,Y,PNR,KG,IND,GFN,KLASSIFIZI,BEVTYP
31490.0792899652,181684.344823149,"1","75314",,,n,GP

And this is the output I want:

X,Y,PNR,KG,IND,GFN,KLASSIFIZI,BEVTYP
31490.08,181684.34,"1","75314",,,n,GP

Answer 1

Here's a little workaround for my problem:

I created two new attributes X and Y for the layer and set the length and precision as posted here.

Then I used a QGIS Expression $x and $y in order to populate the new fields.