Mark Dickinson <dicki...@gmail.com> added the comment:
This isn't a bug: floating-point arithmetic is by its nature approximate, and two sequences of operations that would mathematically give the same result need not give the same result with floating-point. I'd recommend a read of this portion of the tutorial, which goes into some of the issues involved: https://docs.python.org/3/tutorial/floatingpoint.html Having said that, you'll get slightly better accuracy in general (one can't make specific guarantees, since everything's dependent on the platform's math library) if you use `math.sqrt(x)` instead of `math.pow(x, 0.5)`, and `math.log2(y)` instead of `math.log(y, 2)`. ---------- resolution: -> not a bug stage: -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue36055> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
