On Tue, Apr 03, 2018 at 01:00:59AM +0100, Alan Gauld via Tutor wrote:
> You need to use 'in' instead. That will check whether
> or not Grade is *one* of the values in the tuple.
>
> if Grade not in 'A','B','C','D','E','F':
Actually, that returns a tuple consisting of a flag plus five more
strings:
py> 'A' in 'A','B','C', 'D', 'E', 'F'
(True, 'B','C', 'D', 'E', 'F')
We need to put round brackets (parentheses) around the scores:
if Grade not in ('A','B','C','D','E','F'):
Don't be tempted to take a short-cut:
# WRONG!
if Grade not in 'ABCDEF':
as that would accepted grades like "CDEF" and "BC".
--
Steve
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