On Sat, Jul 04, 2020 at 01:01:15AM +0100, MRAB wrote:
> Should it raise an exception if minimum > maximum?
I think there are only two reasonable answers to this:
- raise an exception if the lower bounds is greater than the
upper bounds ("errors should never pass silently");
- or Do What I Mean by swapping them if they are in the wrong
order:
if lower > upper:
lower, upper = upper, lower
I'm +1 on raising and about +0.00001 on DWIM. People who have read my
posts on this mailing list in the past may remember that I am usually
very suspicious of, if not hostile to, DWIM functions, but in this case
I think it's harmless.
This is what numpy does if you get the order wrong:
py> import numpy as np
py> np.clip(5, 1, 10) # This is correct.
5
py> np.clip(5, 10, 1) # WOT?
10
Silently returning garbage is not, in my opinion, acceptable here.
--
Steven
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