Tim Peters <t...@python.org> added the comment: If someone opens a bug report with OpenBSD, or just for us to get more info, it could be useful to have a larger universe of troublesome tan inputs to stare at. So the attached tanny.py supplies them, testing all inputs within 100 ulps of math.pi/2 (or change N=100 to whatever you like).
There are no failures on my 64-bit Win10 3.6.1. The "correct" answers are computed by using mpmath.tan() set to 200 mantissa bits, then rounding back to 53 bits. These all match the results from my dirt-dumb decimal tan() rounded back, but it's better to trust a widely-used package. Of course mpmath needs to be installed ("pip install mpmath" works fine): http://mpmath.org/ Nothing else is needed (while mpmath will exploit gmpy if it's installed, by default it sticks to pure Python code). ---------- Added file: https://bugs.python.org/file47183/tanny.py _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue31630> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com