Im using the field calculator and wants to give a field (fare) a value by reclassifying another field (1000). However, I only want to reclassify where the value in field is Null and leave the other values as they are.
EXPRESSION
Fare= Reclass (!1000!)
Code block
def Reclass (arg):
if arg == 1:
return None
elif arg == 2 and !Fare! is None:
return 2
else
return None