a more precise distance algorithm

[random832 at fastmail.us]

On Mon, May 25, 2015, at 15:21, ravas wrote:
> Is this valid? Does it apply to python?
> Any other thoughts? :D

The math.hypot function uses the C library's function which should deal
with such concerns internally. There is a fallback version in case the C
library does not have this function, in Python/pymath.c - which,
incidentally, does use your algorithm.