vinsci added the comment:
>>> (0).bit_length.__doc__
"int.bit_length() -> int\n\nNumber of bits necessary to represent self in
binary.\n>>> bin(37)\n'0b100101'\n>>> (37).bit_length()\n6"
The library documentation has clearly been written in
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,
