how to determine for using c extension or not ?

[umedoblock]

On 2015年08月04日 03:11, Terry Reedy wrote:

> Posting three times under two different names is not polite.  Please to
> not  repeat.

sorry...

> You should not care.  If you think there is an undocumented difference
> in behavior, ask here if it is a bug.

I don't think a bug in this question.

> I expect that that test/test_bisect.py runs the same tests on both
> versions.  We have a test helper function for such situations.

I didn't know test/support.py and support.import_fresh_module() 
function. I will use this function if I write some C accelerator.
thanks.