IndexError list out of range

Question

import arcpy, sys

workspace = sys.argv[1]
featureclass = sys.argv[2]

try:
  arcpy.env.workspace = workspace
  fields = arcpy.ListFields(featureclass)
  for fld in fields:
     print fld
except:
 print arcpy.GetMessages()

The error I am getting is :

>>>

Traceback (most recent call last):

File "C:\ArcpyBook\Appendix1\ListFields.py", line 3, in <module>

workspace = sys.argv[1]

IndexError: list index out of range

>>>

DanPatterson_Retired · Answer

​or if using your favorite IDE, check how you can enter parameters while running them.  I know Pythonwin pops up a dialog and you can enter the parameters directly so you don't need to hardcode them in a script

DarrenWiens2 · Answer

This code is meant to be run from a script tool with two parameters: workspace and feature class.

For your purposes, you can just enter values for each parameter (sorry, the code block won't let me format it correctly, so there are some indentation issues, but substituting values for the sys.argv parameters is the take-home message).

import arcpy, sys  workspace = r'C:/someworkspace'  
featureclass = r'C:/somefolder/someGDB.gdb/somefeatureclass'
try:    arcpy.env.workspace = workspace    fields = arcpy.ListFields(featureclass)  for fld in fields:  print fld    except:    print arcpy.GetMessages()

DEAF_PROBERT_68 · Answer

@Dan Patterson

Sorry, this code came from the book I am working on from Eric Pimpler's ebook "Programming ArcGIS 10.1 with Python cookbook. That book was in 2013

Yes I find a lot of errors in that book however I tried to tweak some of the codes but was not able to figure it out and I thought there must be a way around to correct it..