I think it's pretty silly to have math.py. And why would there be a
pure-Python implementation of factorial() (like anybody is ever going to
use that) instead of example implementations of sin() etc.? Please don't go
down this path for this particular module. Put your code in a recipe or
something.

On Fri, Mar 6, 2015 at 7:48 AM, Brett Cannon <report@bugs.python.org> wrote:

>
> Brett Cannon added the comment:
>
> I interpret Guido's email as vetoing the skipping of the C implementation
> of PEP 485, not on outright banning a PEP 399 math.py if someone like
> Victor wanted to put the work into implementing some things on top of the C
> code in Python. So as long as everything in the math module has a C
> equivalent I say implement whatever you want in Python code as long as
> maintenance won't be a burden.
>
> ----------
> nosy: +brett.cannon
>
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> <http://bugs.python.org/issue23595>
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