Armin Rigo added the comment: CPython 2.7 and 3.5 have issues with the sign of zeroes even without any custom class:
>>> -(0j) # this is -(0+0j) (-0-0j) >>> (-0-0j) # but this equals to the difference between 0 and 0+0j 0j >>> (-0.0-0j) # this is the difference between -0.0 and 0+0j (-0+0j) >>> -0j -0j # <- on CPython 2.7 (-0-0j) # <- on CPython 3.5 It's unclear if the signs of the two potential zeroes in a complex number have a meaning, but the C standard considers these cases for all functions in the complex number's header. ---------- nosy: +arigo _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29602> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
