On Thu, Jun 25, 2009 at 11:39 AM, Peter Ammon<[email protected]> wrote:
> Are you saying that it's not sloppy to close a file twice, unlock a lock
> twice, etc.?

It sounds to me like you were originally referring to language
implementation sloppiness, which has nothing to do with closing a file
twice, unlocking locks multiple times, etc. (client sloppiness).

> Python doesn't require that its contexts be robust against multiple calls to
> __exit__ (its answer to Dispose()).

Now we're back to implementation sloppiness.  I see no guarantee that
__exit__ will only be called once.  Python users don't typically call
__enter__ and __exit__ explicitly; .NET users often call Dispose()
explicitly, because it is useful in situations other than inside using
blocks.

--Kyle Sluder
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