injecting "set" into 2.3's builtins?

[Sion Arrowsmith]

Stephen Thorne  <stephen.thorne at gmail.com> wrote:
>I have:
>try:
>    set
>except NameError:
>    from sets import Set as set
>
>in my code in a few places.

Is there any reason to prefer this over the idiom I have:
if sys.version_info < (2, 4):
    from sets import Set as set

? (I've also used the same kind of trick to provide enumerate when a
script is being run with pre-2.3.)

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