On 2-7-2015 16:52, Steven D'Aprano wrote: > Despite the title, this is not one of the usual "Why can't Python do > maths?" "bug" reports. > > Can anyone reproduce this behaviour? If so, please reply with the version of > Python and your operating system. Printing sys.version will probably do. > > > x = 1 - 1/2**53 > assert x == 0.9999999999999999 > for i in range(1, 1000000): > if int(i*x) == i: > print(i); break
I can't reproduce it with any of the pythons I have here, they all run to completion: Tested on Mac OSX 10.10.4, with a 64-bit core2duo processor. Below are all 64-bit python implementations: 2.6.9 (apple supplied), 2.7.6 (apple supplied), 3.4.3 (homebrew), and pypy-2.6.0 (homebrew). I don't have any 32 bit Python implementations on the mac. Tested on windows 7, with a 64-bit core2quad processor, but using 32-bit python implementations from python.org: 2.7.9, 3.3.3, 3.4.2, and pypy-2.5.1. Irmen de Jong -- https://mail.python.org/mailman/listinfo/python-list
