[Python-Dev] Possible optimization for LOAD_FAST ?

Guido van Rossum guido at python.org
Tue Jan 4 16:58:46 CET 2011

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)

More information about the Python-Dev mailing list