BrokenLegMike

Iterating through Multivalue list of Layer Files: Error

Discussion created by BrokenLegMike on Sep 30, 2011
Latest reply on Oct 5, 2011 by jesuspisto
Hey all,

I am trying to iterate through a multivalue list of layer files from a parameter (set as a "Layer File" type). I've been trying to loop through the list, but it either errors out or I only get the first layer file returned. In the following script, I'm trying to set the sourceLayer to one of the layer files being fed from a multivalue list. It keeps returning the error:


PYTHON ERRORS:
Traceback info:
  File "Z:\ESRI\Python\Test Scripts\UpdateLayer.py", line 52, in <module>
    sourceLayer = arcpy.mapping.Layer(lyrFile)

Error Info:
Object: CreateObject Layer invalid data source



folderPath = arcpy.GetParameterAsText(0)
layers = arcpy.GetParameterAsText(1).split(";")

for filename in glob.glob(os.path.join(folderPath, "*.mxd")):
    fullpath = os.path.join(folderPath, filename)
    mxd = arcpy.mapping.MapDocument(filename)

    if os.path.isfile(fullpath):
        basename, filename2 = os.path.split(fullpath)

    for df in arcpy.mapping.ListDataFrames(mxd, "*"):
        for lyr in arcpy.mapping.ListLayers(mxd, "*", df):
            for lyrFile in layers:

                if lyr.name == "Land Area":
                    if "Development" in lyrFile:
                        arcpy.AddMessage(lyr.name)
                        arcpy.AddMessage(lyrFile)
                         sourceLayer = arcpy.mapping.Layer(lyrFile)
                         arcpy.mapping.UpdateLayer(df,lyr, sourceLayer, True)
                         del sourceLayer

                if lyr.name == "Disturbed Land":
                    if "Disturbed Land" in layers:
                        arcpy.AddMessage(lyr.name)
                        arcpy.AddMessage(lyrFile)
                         sourceLayer = arcpy.mapping.Layer(lyrFile)
                         arcpy.mapping.UpdateLayer(df,lyr, sourceLayer, True)
                         del sourceLayer

    mxd.save()
    del mxd

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