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arcpy.management,ApplySymbologyFromLayer works from immediate window, but not when running saved script

KristieReece

Attempting to use arcpy.management.ApplySymbologyFromLayer in a python script being run in a model.

Immediate Window:

aprxMap = aprx.listMaps("Layer1")[0]

lyr = aprxMap.listLayers("PointLayer")[0]

arcpy.management.ApplySymbologyFromLayer(lyr, "Q:\GIS_Data\Symbology_Layers\TypeSymbology.lyr")

After reviewing the following link, I attempted that formatting as well within the script, but still not seeing any updates to the symbology. The script runs through with no errors, but nothing changes. Works perfectly in the immediate window though.

Reference the following documentation for creating the script: https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/apply-symbology-from-layer.htm

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DanPatterson

In immediate mode, I assume you are using a python notebook or the python window inside Pro

Is the model being run from within a toolbox?

KristieReece

Hi Dan,

Yes, I am using the python window in ArcGIS Pro to test the code at which point it does everything as expected. The same code is then saved as a script in a toolbox. When run from the tool box the script runs with no errors, BUT the symbology is not changed.

Kristie

DanPatterson

I don't usually update symbology, but I do know that results from a tool should be added to a display, which makes me think that there is no "update" for existing layers.

On a lark, if you toggle off the layer, then toggle it back on, does it update?

If not, check @curtvprice 's comments in

Question on Apply symbology layer for modelbuilder... - Esri Community

If he catches this he probably has some ideas

KristieReece

Unfortunately, toggling the layer did not cause it to update. I looked at the link you provided, and I am familiar with that method of applying symbology to the output of the tool; however, I do not believe that works in this situation as this portion of my model is actually a python script, so I do not believe I can utilize that feature here. The model runs all of the analysis tools and saves the outputs in a specified geodatabase. The python script then goes through and adds all of the output layers to their respective layouts and then is supposed to apply symbology prior to exporting all of the layouts to png.

AvinashPatel

Check and apply the right parameters to update the layer symbology

import arcpy
import sys
def ScriptTool(param0, param1):
# Script execution code goes here
return
# This is used to execute code if the file was run but not imported
if __name__ == '__main__':
# Tool parameter accessed with GetParameter or GetParameterAsText
param0 = arcpy.GetParameterAsText(0)
param1 = arcpy.GetParameterAsText(1)

ScriptTool(param0, param1)
arcpy.management.ApplySymbologyFromLayer(param0, param1, None, "DEFAULT")

# Update derived parameter values using arcpy.SetParameter() or arcpy.SetParameterAsText()

Ramitha

When run as a script, arcpy.management.ApplySymbologyFromLayer returns a new layer but does not modify any of it's inputs. Something like this should do the job?

# Apply symbology changes to lyr, which will create a new finalLayer:
finalLayer = arcpy.management.ApplySymbologyFromLayer(lyr, "Q:\GIS_Data\Symbology_Layers\TypeSymbology.lyr")
# Remove the original lyr from aprxMap
aprxMap.removeLayer(lyr)
# Add the new layer that has the symbology applied
aprxMap.addLayer(finalLayer[0])

MK13

This worked for me. Thank you!! I wish it was part of the documentation.

adunckel_nrcs

This worked for me as well!! Thank you!

tempLayer = active_map.addDataFromPath(local_peaks)

outlayer = arcpy.management.ApplySymbologyFromLayer(tempLayer, layer_file_path)

active_map.removeLayer(tempLayer)

active_map.addLayer(outlayer[0])

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