what exactly is "None" ?

[Erik Max Francis]

"Christopher A. Craig" wrote:

> In Python2.2 and earlier (i.e. all current production versions) None
> is mutable, so you could assign 6 to None and then anything equal to 6
> would return equal.

Well, you still _can_, in 2.3a2, you just get a SyntaxWarning:

Python 2.3a2 (#1, Feb 19 2003, 20:06:49) 
[GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> None = 1
<stdin>:1: SyntaxWarning: assignment to None
>>> None
1

(Mind you, I think the warning is sufficient, just being pedantic.)

-- 
 Erik Max Francis / max at alcyone.com / http://www.alcyone.com/max/
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