Re: [Python-ideas] Disallow orderring comparison to NaN

April 28, 2011

      Mike Graham wrote:
...
On Thu, Apr 28, 2011 at 10:01 AM, Steven D'Aprano <steve@pearwood.info> wrote:
...
I think I would like to see a demonstration of this rather than just take
your word for it.
One demonstration would be
[snip]
Thank you.

Nevertheless, that does appear to be an easy fix:

def bubble_sort(xs):
     while True:
         changed = False
         for i in range(len(xs) - 1):
             # don't use `not (xs[i] < xs[i + 1])` as that fails in the
             # presence of NANs
             if xs[i] >= xs[i + 1]:
                 changed = True
                 xs[i], xs[i + 1] = xs[i + 1], xs[i]
         if not changed:
             break

-- 
Steven