topic Re: IndexError: list index out of range in Python Questions

IndexError: list index out of range

JoanBiediger — Tue, 08 May 2012 16:27:39 GMT

I am new to Python programming and I am trying to see if a working directory is there and if not create it. I keep getting the following error IndexError: list index out of range. Not sure what I am doing wrong.
I would appreciate it if anyone can lend some assistance.

import string, sys, shutil, glob, os, arcpy  #print sys.argv  print arcpy.CheckOutExtension("Spatial") from arcpy.sa import * arcpy.env.overwriteOutput = True  #check to see if scratch directory exists: if os.path.isdir(sys.argv[1] + "/working")<> True:     arcpy.CreateArcInfoWorkspace_management(sys.argv[1], "working")      if os.path.isdir(sys.argv[1] + "/output")<> True:     arcpy.CreateArcInfoWorkspace_management(sys.argv[1], "output") arcpy.AddMessage ("Output workspace created")  arcpy.env.workspace = sys.argv[1]

Re: IndexError: list index out of range

MathewCoyle — Tue, 08 May 2012 16:43:52 GMT

I'd suspect, based on your code, that you only have one argument passing to your script. In that case you would want sys.argv[0]. In Python, as in most computer languages, counting starts at 0.

Re: IndexError: list index out of range

BruceNielsen — Tue, 08 May 2012 17:27:48 GMT

I'd suspect, based on your code, that you only have one argument passing to your script. In that case you would want sys.argv[0]. In Python, as in most computer languages, counting starts at 0.

sys.argv[0] should be the name of the script. sys.argv[1] would be the first parameter. This is different than GetParameterAsText.

Joan,

Unless you're going to be working with Arc/INFO coverages, you probably don't want to use CreateArcInfoWorkspace. Use os.mkdir to create a directory for storing shapefiles, or CreateFileGDB for a file geodatabase.

Re: IndexError: list index out of range

MathewCoyle — Tue, 08 May 2012 17:49:52 GMT

sys.argv[0] should be the name of the script. sys.argv[1] would be the first parameter. This is different than GetParameterAsText.

Joan,

Unless you're going to be working with Arc/INFO coverages, you probably don't want to use CreateArcInfoWorkspace. Use os.mkdir to create a directory for storing shapefiles, or CreateFileGDB for a file geodatabase.

Ah that's right. The only time I've used sys.argv I was doing processing using the script name as an input, that's probably how I got turned around.

Re: IndexError: list index out of range

DarrenWiens2 — Sun, 12 Dec 2021 03:48:26 GMT

I keep getting the following error IndexError: list index out of range. Not sure what I am doing wrong.

Might sound silly, but the only thing I can think of is that you haven't entered a value for the parameter, sys.argv[1]. Have you (ie. when you run the script, do you indicate which folder you want?)?

Does this work? It should.

import arcpy, sys

arcpy.AddMessage(sys.argv[1])
print(sys.argv[1])

Re: IndexError: list index out of range

JoanBiediger — Tue, 08 May 2012 21:01:03 GMT

Hi Darren,

I think you are right, when I print the sys.argv[1] I am getting the folder and the name of the script when what I really want to do is see if a folder exists in the same folder as the script and if
it doesn't then create the folder.

Thanks for your response, I'll keep working on it.

Re: get folder location of python script

curtvprice — Wed, 09 May 2012 00:23:56 GMT

what I really want to do is see if a folder exists in the same folder as the script and if
it doesn't then create the folder.

sys.argv[0] is the path of the script. I think this is what you're trying to do:

import sys import os import arcpy  # create a scratch folder in the same folder as the script Here = os.path.dirname(sys.argv[0]) if not arcpy.exists(os.path.join(Here,"working"):     arcpy.CreateArcInfoWorkspace_management(Here, "working")

Re: IndexError: list index out of range

JoanBiediger — Wed, 09 May 2012 12:19:34 GMT

Hi Curtis,

Thanks for your help, that did the trick.