Dustin M

You can import the "FieldCalc_PreLogic" into the field calc. you will just need to switch over the language from vBscript to Python.

Copy and paste the following into the bottom box after pre-logic is populated. 

populateParity( !FROMFIELD! , !TOFIELD!)
		     ^	          ^
		  REPLACE      REPLACE




The PopulateParityScript.py can be used to populate the parity fields outside of ArcMap. Edit the script to update the file path of you GDB and the left and right range field names, then save and close. Run.