Steven D'Aprano <steve+pyt...@pearwood.info> added the comment: The obvious work-around of calling hypot multiple times is not only tedious, but it loses precision. For example, the body diagonal through a 1x1x1 cube should be √3 exactly:
py> from math import hypot, sqrt py> hypot(hypot(1, 1), 1) == sqrt(3) False I know of at least five languages or toolkits which support this feature, or something close to it: Javascript, Julia, Matlab, GNU Scientific Library, and C++. Javascript and Julia support arbitrary numbers of arguments: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/hypot https://github.com/JuliaLang/julia/pull/15649 Using Firefox's javascript console, I get the correct body diagonal for the cube: >> Math.hypot(1, 1, 1) == Math.sqrt(3) true Matlab's hypot() function only takes two arguments, but norm(vector) returns the Euclidean 2-norm of the vector, i.e. equivalent to the hypot of multiple arguments. https://au.mathworks.com/help/matlab/ref/norm.html The GNU Scientific Library and C++ support a three-argument form of hypot: http://git.savannah.gnu.org/cgit/gsl.git/commit/?id=e1711c84f7ba5c2b22d023dcb7e10810233fff27 http://en.cppreference.com/w/cpp/numeric/math/hypot http://open-std.org/JTC1/SC22/WG21/docs/papers/2015/p0030r1.pdf So +1 on math.hypot supporting arbitrary number of arguments. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue33089> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com