Looking for a slick way to classify relationship between two numbers, without tons of if/else
Tue Jul 7 09:38:50 CEST 2009
palewire <ben.welsh at gmail.com> writes:
> In my application, I'd like to have a function that compares two values,
> either of which may be null, and then classify the result depending on
> whether one is higher or lower than the other.
Didn't we just have a huge thread about that? Using a special null
value is often (not always) a code smell. But anyway (untested):
if a is None and b is None: # I'm guessing you meant this
return "No data"
if a == b:
return "Stayed the same" if a != 0 else "Never had"
elif a < b:
# we know here that a > b
return "Lost some" if b > 0 else "Lost all"
I don't know what you intended to do in the case where exactly one of
(a,b) is None, so I'll leave that to you.
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