topic Re: Model Builder/Python Issue - <type 'exceptions.IndexError'>: list index out of ra in Python Questions

Model Builder/Python Issue - <type 'exceptions.IndexError'>: list index out of range

DustinWaller1 — Wed, 26 Jun 2013 20:05:19 GMT

I am a "rookie" at python and I incorporated a simple python script into model builder. My model runs without issues but when it gets to the python script, I get this error.

<type 'exceptions.IndexError'>: list index out of range

Below is my python file. Any help would be greatly appreciated. Thanks.

import arcpy
import os
import glob

mxd = arcpy.mapping.MapDocument("CURRENT")
df = arcpy.mapping.ListDataFrames(mxd)[0]
lyr_region = arcpy.mapping.ListLayers(mxd, "GOM Regions")[0]
lyr_pro = arcpy.mapping.ListLayers(mxd, "Protraction Areas")[0]
lyr_APC = arcpy.mapping.ListLayers(mxd, "APC Active Leases")[0]
lyr_Blk = arcpy.mapping.ListLayers(mxd, "GOM Blocks")[0]
lyr_Bid = arcpy.mapping.ListLayers(mxd, "Tracts Receiving Bids")[0]

for name in glob.glob('C:\Users\dke610\Desktop\GoM\Sale*'):
    
    if name == 'C:\Users\dke610\Desktop\GoM\SaleWGM.xlsx':
        lyr_region.definitionQuery = "MMS_PLAN_A = 'WGM'"
        lyr_pro.definitionQuery = "REGION = 'WGOM'"
        lyr_APC.definitionQuery = "PLANAREA = 'W'"
        lyr_Blk.definitionQuery = "REGION0712 = 'W'"
        lyr_Bid.showLabels = False
        df.extent = lyr_Blk.getSelectedExtent()
        df.scale *= 1

    else:
        lyr_region.definitionQuery = "MMS_PLAN_A = 'CGM'"
        lyr_pro.definitionQuery = "REGION = 'CGOM'"
        lyr_APC.definitionQuery = "PLANAREA = 'C'"
        lyr_Blk.definitionQuery = "REGION0712 = 'C'"
        lyr_Bid.showLabels = False
        df.extent = lyr_Blk.getSelectedExtent()
        df.scale *= 1


arcpy.RefreshActiveView()        
del mxd

Re: Model Builder/Python Issue - : list index out of ra

MathewCoyle — Wed, 26 Jun 2013 20:46:20 GMT

I'd wager it was because one of those layers you are trying to reference do not exist in the mxd.

Re: Model Builder/Python Issue - : list index out of ra

DustinWaller1 — Thu, 27 Jun 2013 11:20:40 GMT

I would say that I agree but the model runs from the Model Builder Edit window. I only errors out when I double click on the model in the toolbox to run it.

Re: Model Builder/Python Issue - : list index out of ra

MathewCoyle — Thu, 27 Jun 2013 12:18:40 GMT

If you are running it out of process you may have problems with the 'current' keyword for your mxd, but that should give you a different error. Are any of those layers created within the model you are running? Or do they all exist in the mxd prior to the model running?

Re: Model Builder/Python Issue - : list index out of ra

DustinWaller1 — Sun, 12 Dec 2021 03:48:55 GMT

lyr_Bid = arcpy.mapping.ListLayers(mxd, "Tracts Receiving Bids")[0]

This layer is created in the model. I removed that line out of my script and it ran successfully. I suppose the issue is that the "Tracts Receiving Bids" layer isn't displayed until the whole model, script and all, runs completely. Is there a way to display that layer after it is created? This is how it works when running it within model builder.

Re: Model Builder/Python Issue - : list index out of ra

MathewCoyle — Sun, 12 Dec 2021 03:48:58 GMT

lyr_Bid = arcpy.mapping.ListLayers(mxd, "Tracts Receiving Bids")[0]
This layer is created in the model. I removed that line out of my script and it ran successfully. I suppose the issue is that the "Tracts Receiving Bids" layer isn't displayed until the whole model, script and all, runs completely. Is there a way to display that layer after it is created? This is how it works when running it within model builder.

If you only need the layer for the model you can use the Make Feature Layer tool and reference it in memory. If you need to add it to the map you can then use the Add Layer function in the mapping module after processing.

Re: Model Builder/Python Issue - : list index out of ra

DustinWaller1 — Thu, 27 Jun 2013 13:32:43 GMT

Thanks for your help. It is appreciated.