ArcGIS Pro Calculate Field Using Python - Return String if Field is Null not working

Question

def RampQA(ramp_type😞    if ramp_type is None:       return "Ramp type is blank"  This hasnt worked, but feels like it should be simple... "ramp_type" is a string field. This calculation would return an error in a completely different field. Instead of returning "Ramp type is blank" it just returns Null in that field and results in this warning message:

WARNING 002858: Certain rows set to NULL due to error while evaluating python expression: File "<string>", line **, in RampQA

JoshuaBixby · Answer

You don't even need a code block for this, a Python 6.13. Conditional expressions in the expression block will do the trick:

"Ramp type is blank" if !ramp_type! is None else !ramp_type!

AustinAverill · Answer

This is likely the root. Trying to verify "blank" values in field calculator is a mess.

Richard Howe · Answer

Your expression for the above code block would need to be:

RampQA(!ramp_type!)