New submission from vinsci: It takes as many bits to store the number 0 as the number 1, but the implementation claims it takes no bits at all to store a 0.
>>> (1).bit_length() == (0).bit_length() and True or False False It takes one extra bit to store the sign for negative numbers, but this isn't reflected in the implementations. >>> (-1).bit_length() == 1 + (1).bit_length() and True or False False ---------- components: Library (Lib) messages: 299500 nosy: vinsci priority: normal severity: normal status: open title: mathematically wrong results from int and long bit_length methods type: behavior versions: Python 2.7, Python 3.3, Python 3.4, Python 3.5, Python 3.6, Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue31079> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
