[Python-Dev] PEP 3000 and iterators

[James Y Knight]

On Sep 11, 2005, at 11:24 AM, Guido van Rossum wrote:
> But it breaks the desire to keep the Python 3.0 language clean from
> deprecated features.

That is a nice goal, another nice goal is to not unnecessarily break  
things.

> But just installing python3.0 as python and expecting
> nothing will break is not a goal -- it would be too constraining.
>

Just to be clear, I do not want nor expect this. I wish to be able to  
specifically modify code with full knowledge of what has changed in  
Py3.0 such that it will work with both Py2.X and Py3.0.

And, now is probably not really the right time to discuss such minor  
issues as whether to keep iteritems in Py3.0, but, if it is kept, it  
becomes easier to write such code. It is of course still possible to  
write compatible code without keeping iteritems, you just have to  
replace all the method calls with a function wrapper which calls one  
of items or iteritems depending on the version.

James