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Tue Jan 4 16:58:46 CET 2011 · https://mail.python.org/pipermail/python-dev/2011-January/107196.html

On Tue, Jan 4, 2011 at 2:49 AM, Michael Foord <fuzzyman at voidspace.org.uk> wrote:
> I think someone else pointed this out, but replacing builtins externally to
> a module is actually common for testing. In particular replacing the open
> function, but also other builtins, is often done temporarily to replace it
> with a mock. It seems like this optimisation would break those tests.

Hm, I already suggested to make an exception for open, (and one should
be added for __import__) but if this is done for other builtins that
is indeed a problem. Can you point to example code doing this?

-- 
--Guido van Rossum (python.org/~guido)

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[Python-Dev] Possible optimization for LOAD_FAST ?