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Tue Sep 1 18:40:17 CEST 2009 · https://mail.python.org/pipermail/python-dev/2009-September/091533.html

On Mon, Aug 31, 2009 at 5:01 PM, Greg Ewing <greg.ewing at canterbury.ac.nz>wrote:

> Antoine Pitrou wrote:
>
>  Did your coworker run any timings instead of basing his assumptions on
>> bytecode
>> size?
>>
>
> In any case, what are you suggesting -- that the last value
> returned by a function call in the body should be the
> default return value?
>
> I don't think the unpredictability that would introduce
> would be a good idea.
>

Never mind the fact that there is a lot of Python code out there that
assumes that functions without an explicit return value, return None.

This is pretty fundamental to the Python API.

-jake
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[Python-Dev] default of returning None hurts performance?