timeit module in IDLE

Terry Reedy tjreedy at udel.edu
Thu Mar 14 08:21:38 CET 2013

On 3/14/2013 2:58 AM, Chris Angelico wrote:
> While putting together some timing stats for the latest Python 3.3
> string representation thread, I ran into an oddity in how IDLE handles
> timeit. The normal way to profile Python code, according to stuff I've
> found on the internet, is timeit.timeit:
>>>> import timeit
>>>> timeit.timeit("s=s[:-1]+u'\u1234'","s=u'asdf'*10000",number=10000)
> 0.57752172412974268
> Now I knew that the module I wanted was timeit, but I didn't remember
> the full incantation, so I did the obvious thing:
>>>> import timeit
>>>> timeit.<ctrl-space>
> Only one thing came up: Timer. And help(timeit) doesn't mention
> timeit.timeit either. Whereas the documentation:
> http://docs.python.org/2/library/timeit.html
> http://docs.python.org/3/library/timeit.html
> clearly states that timeit.timeit() is the way to do things.
> Snooping the source shows that timeit.timeit() is just a tiny
> convenience function (alongside timeit.repeat()), but it'd still be
> nice to have that come up in the Ctrl-Space list, since it's the
> most-normal way to run timing tests.
> Would there be a problem with adding timeit (and possibly repeat) to __all__?
> -__all__ = ["Timer"]
> +__all__ = ["Timer", "timeit"]

I believe everything in the doc should be in __all__. Open an issue on 
the tracker and add terry.reedy as nosy.
Note on the issue that timeit.default_timer is not callable, contrary to 
the doc (which should also be fixed).

Terry Jan Reedy

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