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I have a county file in arcmap and trying to assign values in field calculator based on county name. I don't have experience writing scripts.

The county field is tl_2010_55_county10.NAMELSAD10, and the new field in which I am trying to assign values is tl_2010_55_tract10.NitValue. The type is "short".

I am in field calculator, and have the Python "code block" up:

def myValue( !tl_2010_55_county10.NAMELSAD10!, !tl_2010_55_tract10.NitValue! ):
  if ( !tl_2010_55_county10.NAMELSAD10! == "Clark County"):
   !tl_2010_55_tract10.NitValue! = 1
  else:
   !tl_2010_55_tract10.NitValue! = 0

Then, in the little box at the bottom that says: !tl_2010_55_tract10.NitValue! =

I call the function:

myValue( !tl_2010_55_county10.NAMELSAD10!, !tl_2010_55_tract10.NitValue! )

However, when I run this, it says there was a failure geo-processing.

halfer
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DiamondJoe12
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1 Answers1

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Try this in the big codeblock: 

Dim blah
  if !tl_2010_55_county10.NAMELSAD10! = "Clark County" Then
    blah=1
  else blah = 0
  End If

And the just type "blah" (without the quotations) into the lower box after NitValue! =

Matt Goodman
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  • Make sure the Python "parser" radio button is checked, near the top of the Field Calculator dialog (I'm prone to forget to do this!) – Matt Goodman Jul 15 '16 at 19:23