Dual look-up on keys?

[Steven D'Aprano]

On Wed, 05 Mar 2008 14:51:04 -0800, castironpi wrote:

> Anyway, if (a,b) is a key in dictionary d, can it guarantee that (b,a)
> is also in it, and maps to the same object?

It would take you approximately five seconds to answer that question for 
yourself.

>>> D = {(1,2): "x"}
>>> D[(2,1)]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: (2, 1)


You've already been plonked by one long-time regular today. Are you 
aiming to get plonked by *everybody*?

http://en.wikipedia.org/wiki/Plonk



-- 
Steven