find all multiplicands and multipliers for a number

Steven D'Aprano steve+comp.lang.python at pearwood.info
Sun Apr 12 06:29:29 CEST 2015


On Sun, 12 Apr 2015 02:24 pm, Paul Rubin wrote:

> Steven D'Aprano <steve+comp.lang.python at pearwood.info> writes:
>> Ah, the penny drops! Are you using Python 2.7 with old-style division?
>> That would explain it.
> 
> Yes, see also the use of the print statement in that post.  I'm
> surprised the code compiled at all in Python 3.

I wasn't using Python 3. I was using 2.7 with "from __future__ import
division", as the BDFL intended :-)


>> Nice! Except that your fac() function has a bug: it includes 1 as a prime
>> factor for some values, which is strictly incorrect.
> 
> Good catch, I noticed that too after posting.
> 
> This might be of interest:
> 
> http://wrap.warwick.ac.uk/54707/1/WRAP_Hart_S1446788712000146a.pdf
> 
> I haven't tried figuring it out or coding it yet.

Thanks!


-- 
Steven




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