define 'in' operator on lists

[Peter Otten]

Michael Hoffman wrote:

> Peter Otten wrote:
>> Michael Hoffman wrote:
>>>It's probably a good idea not to shadow the long built-in.
>> 
>> Relax. It's only shadowed inside a function that doesn't use the builtin
>> anyway.
> 
> I can see that, but I was thinking mainly in terms of avoiding warnings
> and problems if the Python developers eventually try to optimize
> references to the builtins :)

I can see how assigning to a global can cause trouble here, but a local
should be easy to resolve at compile time as 'not the builtin' and
therefore not hinder optimization.

Peter