Roman Numerals check issue
I would like to give some feedback about the pass test for the Roman Numerals problem. When I go to check my results, the checkio environment finds that:
checkio(1) returns null, when it should return 'I'
But when I run my code in the IDLE environment on my computer, it produces a 'I' when given checkio(1).
(my code is attached)
From: https://py.checkio.org/mission/roman-numerals/solve/
HTTP_USER_AGENT:
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36