topic Apply Symbology not working inside toolbox python script in Python Questions

Apply Symbology not working inside toolbox python script

BrandonMcAlister — Fri, 06 Dec 2024 13:36:14 GMT

Hey everyone,

I have a python script that I wrote which creates a feature class and overwrites a feature class in my geodatabase then overwrites a feature on my enterprise portal. (11.1) Arc Pro Version 3.2.

The issue I have is that this piece of code executes perfectly in the python window, and in a notebook. It will run in the toolbox with no errors but not update the single symbol symbology. I found a bug from 2021 but I am unsure if it was solved.

#Apply Symbology to new layer symbol = MP.listLayers("Symbology")[0] Publish = MP.listLayers("Active_DN_Inspections")[0] #creates variable for layer arcpy.management.ApplySymbologyFromLayer( in_layer = Publish, in_symbology_layer = symbol, symbology_fields = None, update_symbology = "DEFAULT" )

https://support.esri.com/en-us/bug/applysymbologyfromlayer-in-a-python-script-in-arcgis-pr-bug-000116527

https://community.esri.com/t5/arcgis-pro-questions/applysymbologyfromlayer-management-inside-toolbox/m-p/1090734#M44679

Re: Apply Symbology not working inside toolbox python script

TonyAlmeida — Fri, 06 Dec 2024 15:31:09 GMT

The symbology created in a script tool, the tool must include the layer as a derived output parameter.

Re: Apply Symbology not working inside toolbox python script

BrandonMcAlister — Thu, 12 Dec 2024 18:14:11 GMT

@TonyAlmeida

After much trouble and research I was able to get it to work by doing this:

results = [] res = arcpy.management.ApplySymbologyFromLayer( in_layer = Publish, in_symbology_layer = symbol, symbology_fields = None, update_symbology = "DEFAULT" ) results.append(res) arcpy.SetParameter(2, results)

where parameter 2 is set up like this:

Label: OutputLayer

Data Type: Layer

Type: Derived

Direction: Output