I am trying to write a script partially in ArcGIS ModelBuilder and adding an if statement on my own.

It uses the Feature Compare tool in arcgis and I want to use the result.getOutput in an If statement so that if it is true then run a process - in this case a copy features.

The big picture here is to compare two features and if there are differences in them then truncate and update.

I need help with the If statement or alternative. I don't think I'm getting result.getOutput value to pass to the if statement and then run the if. Can anyone see where this might be incorrect?

# -*- coding: utf-8 -*-
# --------------------------------------------------------------------------    -
# compare_test1.py
# Created on: 2015-11-03 14:06:44.00000
#   (generated by ArcGIS/ModelBuilder)
# Description: 
# ---------------------------------------------------------------------------

# Import arcpy module
import arcpy

# Local variables:
test = ""
PARKING_CopyFeatures = "G:\\Projects 10\\Corporate Services\\Information Technology\\Default.gdb\\PARKING_CopyFeatures"

# Process: Feature Compare
result = arcpy.FeatureCompare_management(TONGIS_PARKING, TONGIS_PARKING__2_, "GLOBALID", "ALL", "", "0.00001 Unknown", "0", "0", "", "", "NO_CONTINUE_COMPARE", test)
changes = result.getOutput(1)
#print "Comparision Result is: " + changes
change = str(changes)
if change == "True":
    # Process: Copy Features
    arcpy.CopyFeatures_management(TONGIS_PARKING__2_, PARKING_CopyFeatures, "", "0", "0", "0")   
  • Is it a typo that your if statement is not using change?
    – Paul
    Commented Nov 23, 2015 at 16:43
  • Yes, I corrected it in my question.
    – Scott
    Commented Nov 23, 2015 at 18:25
  • 2
    check if result.getOutput(1) is actually "True" or True (there's a difference).
    – Paul H
    Commented Nov 23, 2015 at 18:26
  • For boolean True/False you should not include the quotation marks as you elude to @Paul H
    – Jeff May
    Commented Nov 23, 2015 at 19:34
  • @JeffMay, personally, I wouldn't put it past arcpy to return a string, though.
    – Paul H
    Commented Nov 23, 2015 at 19:55

1 Answer 1


This is a case sensitivity issue. getOutput(1) on the Result object returned by Feature Compare will be 'true' or 'false' (not 'True' or 'False', or True or False).

Note: getOutput(n) always returns a string (for any geoprocessing tool).


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