PEP 308: Alternative conditional operator forms -- Corner Case solved

[Andrew Koenig]

Terry> Given this understanding (which I realize I should explain
Terry> further), it is straightforward and obvious that their
Terry> combination forms a conditional selection expression, just as
Terry> the combination a+b*c forms an arithmetic expression.

Yes, it is straightforward and obvious.

It is also wrong.

The reason it is wrong is the result when a is true and b is false.
If (a and b or c) were really a conditional selection expression,
then you would expect the result to be b.  In fact, it is c.

        >>> 1 and 3 or 7
        3
        >>> 1 and 0 or 7
        7

-- 
Andrew Koenig, ark at research.att.com, http://www.research.att.com/info/ark