efficient idiomatic queue?

[Aahz Maruch]

In article <eppstein-27FE15.16175514012002 at news.service.uci.edu>,
David Eppstein  <eppstein at ics.uci.edu> wrote:
>
>What is the idiomatic way in Python of implementing the following 
>operations on a list of elements:
> - return the element at the front of the list, without changing the list
> - remove the element from the front of the list
> - add a new element to the rear of the list

Just to be a jerk, why not use a dict with a couple of index variables?
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