Ah, I see. Thank you!

I wanted to iterate over the string in message, but was returning an error saying I couldn't iterate over Nonetype - which was weird, as I assumed the input was a string
So I ran one line with print(message) and it returned this:

rot13 on predefined strings
Log
test
None should equal 'grfg'
Log
test
None
None should equal 'test'

Why is it doing this?

debug using print thru each stage from input to output

Function def is included in char count