How to implement derived output parameter for ApplySymbologyFromLayer()

cweirpatrickco — Mon, 18 Dec 2023 18:07:09 GMT

I'm trying to set feature symbology's from .lyrx files in a python script tool but am running into issues. The code runs with no errors but the .lyrx symbologies aren't applied (ie the symbologies don't change after script completion). I've opened a case with ESRI support, but it hasn't been much help. On the tool documentation page it says...

"
To see the symbology created in a script tool, the tool must include the layer as a derived output parameter. Similarly, the Updated Input Layer parameter value must be added as a derived model parameter model tool to see the symbology changes.”
"

How can I successfully implement that into this code? I tried in Line 32 but had no luck.

def apply_lyrx(map_object, lyrx_folder): """ Applys .lyrx files to layers in the TOC according to layer name Parameters: - map_object (arcpy.mp.ArcGISProject("").activeMap): Map object - lyrx_folder (path): path to .lyrx source folder Returns: None """ # Loop through layers in the TOC for lyr in map_object.listLayers(): if "primary" in lyr.name.lower(): lyrx_file = "Primary.lyrx" elif "secondary" in lyr.name.lower(): lyrx_file = "Secondary.lyrx" elif "pole" in lyr.name.lower() and "anno" not in lyr.name.lower(): lyrx_file = "Pole.lyrx" elif "anno" in lyr.name.lower(): lyrx_file = "Pole_Anno.lyrx" else: lyrx_file = "clip_poly.lyrx" symb_path = os.path.join(lyrx_folder, lyrx_file) # apply .lyrx file if lyr.isFeatureLayer: arcpy.ApplySymbologyFromLayer_management(lyr, symb_path) # Set layer as derived output parameter arcpy.SetParameterAsText(0, lyr) arcpy.AddMessage(f"'{lyrx_file}' applied to '{lyr}'") else: arcpy.AddMessage(f"'{lyr.name}' is not a feature layer...") arcpy.AddMessage("All .lyrx files applied...") aprx.save()

PS: see attached .txt file for a stand-alone version of this code that works when run in the python window (symbologies get updated)... so I know it's something when running ApplySymbologyFromLayer() in a script tool.

Re: How to implement derived output parameter for ApplySymbologyFromLayer()

cpehlke — Mon, 18 Dec 2023 19:40:40 GMT

Hi,

I've run into this same problem before.

What worked for me was not using:

ApplySymbololgyFromLayer()

but instead using:

SetParameterSymbology()

https://pro.arcgis.com/en/pro-app/latest/arcpy/functions/setparametersymbology.htm

topic How to implement derived output parameter for ApplySymbologyFromLayer() in Developers Questions

How to implement derived output parameter for ApplySymbologyFromLayer()

Re: How to implement derived output parameter for ApplySymbologyFromLayer()