topic Re: Layer Description to Text Tile in Python Questions

Layer Description to Text Tile

MollyWatson — Wed, 05 Oct 2011 17:16:02 GMT

Hello,

I am new to Python and have been researching the forums and other websites for tips on writing a Python code to get the layer descriptions from layers in an MXD and output those descriptions in a text file. This is what I have so far, but I am getting an exceptions.AttributeError 'str' object has no attribute '_arc_object'. I'm not sure what that error means or how to correct it. Thanks for any help!

# Setup
# Import arcpy module
import sys, string, os, arcpy
from arcpy import env
from arcpy import mapping

# Data: Declare environment variables
env.overwriteOutput = 1
env.workspace = workspace = r"V:\gislu\_PlanX\Layer"
output = r"V:\gislu\_PlanX\Temp.txt"

#Create Output Text File
outFile = open (output , "w")

#Reference MXD and Data Frame
mxd = arcpy.mapping.MapDocument("Current")
df = arcpy.mapping.ListDataFrames ("Layers") [0]

# Reference each layer in data frame
lyrList = arcpy.mapping.ListLayers(mxd, "", df)
for lyr in lyrList:
    outFile.write("\n")
    outFile.write("\t\t LAYER: " + lyr.name + "\n")
if lyr.supports("DESCRIPTION"):
    outFile.write("\t\t\t Description: " + lyr.description + "\n")
else:
    outFile.write("t\t\t Description: N/A \ n")

Re: Layer Description to Text Tile

JakeSkinner — Wed, 05 Oct 2011 17:56:34 GMT

Looks like the problem is with your 'df' variable. You will need to reference the MXD and then the data frame. Change it to the following and I believe everything should work:

df = arcpy.mapping.ListDataFrames (mxd, "Layers") [0]

Re: Layer Description to Text Tile

AlessandroCinnirella — Wed, 05 Oct 2011 18:00:05 GMT

#Reference MXD and Data Frame
mxd = arcpy.mapping.MapDocument("Current")
the "CURRENT" keyword works only if you run the script from within the pythonwindow
if you run your script from outside arcgis you must put the path/to/mxd
and, when declaring the df:

not
df = arcpy.mapping.ListDataFrames ("Layers") [0]
but
df = arcpy.mapping.ListDataFrames (mxd) [0]

ciao,
AC

Re: Layer Description to Text Tile

MollyWatson — Thu, 06 Oct 2011 14:00:16 GMT

Thank you. Your suggestions made the script run successfully. However, the output text file only contains the layer names and not the descriptions. I've attached it so you can see. Most of the layers have layer descriptions so they should show up.

Re: Layer Description to Text Tile

RyanKelley — Thu, 06 Oct 2011 14:44:45 GMT

I couldn't replicate this issue... are you sure you have layer descriptions (just checking)?

Obviously all of you layers support descriptions, or you'd be getting "Description N/A" somewhere...

Re: Layer Description to Text Tile

JeffBarrette — Fri, 07 Oct 2011 13:44:54 GMT

Check out the following sample scripts:

http://resources.arcgis.com/gallery/file/geoprocessing/details?entryID=A910AB18-1422-2418-3418-3885D388EF60

There are some reporting tools that do exactly what you want.

Jeff

Re: Layer Description to Text Tile

MollyWatson — Fri, 07 Oct 2011 13:45:51 GMT

Yes all but 3 of layers have descriptions. When I ran it again this morning, one description showed up but no others. And for the 3 layers with no descriptions, there was no N/A after it. Did the script work with your data when you tried to replicate the error?

Re: Layer Description to Text Tile

MollyWatson — Fri, 07 Oct 2011 13:47:54 GMT

I wonder if it is an issue with group layers. The one layer description that did show up was not a group layer. Most of the other layers in the MXD are group layers and the descriptions are not showing up. When you ran the script, were your layers group layers or single layer files?

Re: Layer Description to Text Tile

MollyWatson — Fri, 07 Oct 2011 13:55:58 GMT

I changed the script to try to account for the group layers but it only displays the description for the layer at the very bottom of the group layer:

# Setup
# Import arcpy module
import sys, string, os, arcpy
from arcpy import env
from arcpy import mapping

# Data: Declare environment variables
env.overwriteOutput = 1
env.workspace = workspace = r"V:\gislu\_PlanX\Python"
output = r"V:\gislu\_PlanX\Python\Temp.txt"

#Create Output Text File
outFile = open (output , "w")

#Reference MXD and Data Frame
mxd = arcpy.mapping.MapDocument(r"V:\gislu\_PlanX\Python\PlanXLayers.mxd")
df = arcpy.mapping.ListDataFrames (mxd, "Layers") [0]

# Reference each layer in data frame
lyrList = arcpy.mapping.ListLayers(mxd, "", df)
for lyr in lyrList:
    outFile.write("\n")
    outFile.write("\t\t LAYER: " + lyr.longName + "\n")
if lyr.isGroupLayer:
    outFile.write("\t\t\t Description: " + lyr.description + "\n")
else:
    outFile.write("t\t\t Description: N/A")

Re: Layer Description to Text Tile

MollyWatson — Fri, 07 Oct 2011 14:49:10 GMT

Thanks the layer reporting script helped. I basically copied and pasted the items I want the report to show but I get an error on line 39 "UnicodeEncodeError: 'ascii' codec can't encode character u'\u2019' in position 100: ordinal not in range(128) 'ascii' codec can't encode character u'\u2019' in position 100: ordinal not in range(128)." Do you know what this means? My new script is attached.

Re: Layer Description to Text Tile

JeffBarrette — Sun, 09 Oct 2011 01:08:04 GMT

Is it possible that your layer description is a number? Could you try changing line 39 to something like:

outFile.write("\t\t\t Description: " + str(lyr.description) + "\n")

Jeff

Re: Layer Description to Text Tile

MollyWatson — Mon, 10 Oct 2011 15:23:07 GMT

Jeff, thanks for the suggestion. I copied your suggestion for line 39 and got a new error:
UnicodeEncodeError: 'ascii' coded can't encode character u'\u2019' in position 83: ordinal not in range(128)

Re: Layer Description to Text Tile

JeffBarrette — Tue, 11 Oct 2011 19:28:50 GMT

Can you tell me what the value of your description is?

print lyr.description

Jeff