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On 25Oct2012 22:04, Terry Reedy <> wrote:
| Containment of nan in collection is tested by is, not ==.
| >>> nan = float('nan')
| >>> nan2 = float('nan')
| >>> nan2 is nan
| False

This argues otherwise, and for use of math.isnan() instead.

I expect you were making the point that another NaN is distinct, but it
didn't seem clear to me.

Cheers,
--
Cameron Simpson <>

In article , (Mcrider) writes:
>Could one of you physicist-type cyber-riders give a lucid description/
>explanation of what some folks loosely refer to as a 'tank-slapper'?

An undamped oscillation of camber thrust, with positive feedback,
applied to the front contact patch? :^)
- Ed Green, , DoD#0111