So I found this python script on another post here and was trying to adjust it for my needs. I'm a very novice python user so I'm struggling with how to modify the script. I have a Feature Class stored in a feature Dataset that I want to search a field for duplicate values and populate a new field with Y for duplicate or N for none. The below script is what I found that looks like it will work once I find a way to drill down into my file geodatabase.
from arcpy import * inShapefile = pointsShapefile checkField = "xyCombine" updateField = "dplicate" #List of values found once occursOnce =  #list of values found twice occursTwice =  cursor = da.SearchCursor (inShapefile, [checkField]) for row in cursor: #Check value is not null if row: #If not already found to occur twice, proceed if not row in occursTwice: #If hasn't occured once yet if not row in occursOnce: #Add to occurs once list occursOnce.append (row) #If value has already been found once else: #Add to occurs twice list (duplicates) occursTwice.append (row) del cursor cursor = da.UpdateCursor (inShapefile, [checkField, updateField]) for row in cursor: #Check value is not null if row: #check if value in occursTwice list (i.e. is duplicate) if row in occursTwice: row = "Y" else: row = "N" cursor.updateRow(row) del cursor