Exporting two vectors layer as one image

Question

I am writing Python code to take two vector layers as input add different symbology to it and then export that as a image. The vectors layers have been added to the map canvas but while exporting only the second vector file in the image not both vector file.

  import os

  w_layer = r"path to first vector layer"

  o_layer = r"path to second vector layer"

  image_location = r"export image path"

  wlayer = QgsVectorLayer(w_layer, "W layer", "ogr")

  QgsProject.instance().addMapLayer(wlayer)

  wlayer.loadNamedStyle(r"path for qml file to display a particular symbology")



  olayer = QgsVectorLayer(o_layer, "o layer", "ogr")

  QgsProject.instance().addMapLayer(olayer)

  olayer.loadNamedStyle(r"path to qml file to display a particular symbology")




   vlayer = iface.addMapLayers(wlayer , olayer)

   settings = QgsMapSettings()

   settings.setLayers([vlayer])

   settings.setBackgroundColor(QColor(255, 255, 255))

   settings.setOutputSize(QSize(800, 600))

   settings.setExtent(vlayer.extent())



   render = QgsMapRendererParallelJob(settings)


   def finished():

      img = render.renderedImage()


      img.save(image_location, "png")

   render.finished.connect(finished)


   render.start() `

Answer 1

In the original code, iface.addMapLayers does not exist not anywhere in the doc e.g https://qgis.org/api/classQgisInterface.html. So, simply remove it.

Because of the previous remark, settings.setLayers([vlayer]) can't work as vlayer content is None.

Use settings.setLayers([wlayer, olayer]) instead to solve your issue.