[Python-ideas] Yet another sum function (fractions.sum)

[random832 at fastmail.us]

On Tue, Aug 20, 2013, at 18:47, Andrew Barnert wrote:
> So instead of math.sqrt and cmath.sqrt, we just have one function that
> decides whether sqrt(-1) is 0+1j or an exception based on guessing
> whether you wanted complex numbers? :)

Why exactly is an exception reasonable? If you don't want complex
numbers, don't take square roots of negative numbers. If you can't
handle complex numbers, you'll get an exception down the line anyway.