List Behavior when inserting new items

[Drew]

> > Is there any way to produce this kind of behavior easily?Hints:
>  >>> [None] * 5
> [None, None, None, None, None]
>  >>> [1, 2, 3, None] + [10]
> [1, 2, 3, None, 10]
>
> HTH

That is exactly what I was looking for. I'm actually working on some 
problems at http://codgolf.com. I find it helps me to learn a language 
and I'm coming from ruby where arrays have subtle differences from 
python's lists. Thanks for all the helpful responses.