[Python-Dev] dict containment annoyance

[Georg Brandl]

tomer filiba wrote:
> [Aahz]
>> -1
>>
>> This is seriously no different from an attempt to do
>>
>> >>> a = {}
>> >>> a[ [] ] = 1
> 
> how so? i'm not trying to modify/store anything in a dict.
> i'm only testing if a certain object is contained in the dict.
> that's totally different.
> imagine this:
>>>> x = 6
>>>> x < 2
> am i trying to modify 'x' in any way? i'm only testing if x is
> less than 2.

The correct analogon is

 >>> x = []
 >>> x < 2

which currently works in Python, but won't in 3.0.

Georg