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From: "Colin J. Williams" <cjw@ncf.ca>
Subject: Re: and becomes or and or becomes and
Date: Mon, 23 May 2011 08:20:16 -0400
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On 22-May-11 15:23 PM, Stef Mientki wrote:
> hello,
>
> must of us will not use single bits these days,
> but at first sight, this looks funny :
>
>>>> a=2
>>>> b=6
>>>> a and b
> 6
>>>> a&  b
> 2
>>>> a or b
> 2
>>>> a | b
> 6
>
> cheers,
> Stef
5.2. Boolean Operations — and, or, not

These are the Boolean operations, ordered by ascending priority:
       Operation 	Result 	Notes
         x or y 	     if x is false, then y, else x      	(1)
        x and y 	     if x is false, then x, else y 	        (2)
         not x 	     if x is false, then True, else False 	(3)

The second line is puzzling at first look, but consistent.

It is analogous to the Conditional Expression.
See: 
http://docs.python.org/reference/expressions.html#conditional-expressions

Colin W.