Every single example I see online, the code has the mapname.listLayers() in order to call the layer.

Don't we have a way to call the layer by its name instead? The reason I'm asking this is because this code does not work at all:

aprx = arcpy.mp.ArcGISProject("CURRENT")
aprxMap = aprx.listMaps("Map")[0]
install_layer = aprxMap.listLayers(installname)
layer_simbology = r"C:\ArcGIS\LAYER\symbologylayer.lyrx"
arcpy.ApplySymbologyFromLayer_management(install_layer, layer_simbology)

The code does not update the symbol, neither remove the layer from the map. But add the Feature Class (outfcname) to map.

  • I'm having trouble following the code. You bring in "layer_simbology" to change the symbology of "install_layer", but then you remove "install_layer"? You might need to refresh the map after applying, or add it back to the map? – dslamb Sep 24 '19 at 20:11
  • The removeLayer part was just for troubleshooting. I noticed that the Applysimbology is not working. So I added the removeLayer, and saw that the layer is not being removed as well. With that i got the conclusion that the issue is how I'm calling the layer. – Gustavo Sep 24 '19 at 20:19

aprxMap.listLayers() will return a list even if there is only one layer that matches the wildcard you passed. You need to index the 0 position in the list before assigning it to install_layer.

install_layer = aprxMap.listLayers(installname)[0]

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