Arcpy For Loop to Apply Symbology to Multiple Layers

DarrochKaye

Hi,

I have multiple layers in ArcMap that I want to import a symbology for from a layer file. The code I have is as follows:

import arcpy
from arcpy import env

# Reference current MXD and dataframe. 
mxd = arcpy.mapping.MapDocument("CURRENT")
df = arcpy.mapping.ListDataFrames(mxd, "Layers")[0]
layers = arcpy.mapping.ListLayers(mxd,"",df)

# Layer file symbology to be imported is in.
in_symbology_layer = arcpy.mapping.Layer("C:\LayerStyles\LayerFile.lyr")

# Layer to receive imported symbology.
in_layer = arcpy.mapping.ListLayers(mxd, "", df)[0]

# For loop to import symbology to all layers in current MXD.
for lyr in layers:
  try:
    arcpy.ApplySymbologyFromLayer_management(in_layer,in_symbology_layer)
  except:
    print "Failed to import symbology for: " +lyr.name

# Refreshes Table of Contents.
arcpy.RefreshTOC()

The code seems to work in parts, as the output I get is:

"Failed to import symbology for: Layer1

"Failed to import symbology for: Layer2

"Failed to import symbology for: Layer3..."

For loops are my Achilles Heel so any assistance would be greatly appreciated!

Thanks,

DK

DanPatterson_Retired

you retrieve the first layer in the data frame and are trying to apply the symbology from layer on disk.  Have you confirmed that the layers are of the same type so that the symbology will apply?

("C:\LayerStyles\LayerFile.lyr")  should be (r"C:\LayerStyles\LayerFile.lyr")  raw formatted with the "r" just be sure it can find the layer.  So, dump the try except block so you get a real error message, confirm that the layer can be found and use a check to ensure that the symbology from that layer is appropriate for the layer it is trying to apply it to.