On 2012-07-30 at 00:44:04 +0000, Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> wrote:
> I wish to extract the bit fields from a Python float, call it x. First I > cast the float to 8-bytes: > > s = struct.pack('=d', x) > i = struct.unpack('=q', s)[0] > > Then I extract the bit fields from the int, e.g. to grab the sign bit: > > (i & 0x8000000000000000) >> 63 > 3) Any other problems with the way I am doing this? No, but perhaps this would be clearer: import math sign = math.copysign(1.0, x) There are solutions that use math.frexp, too, but IMO they're more obtuse. HTH, Dan -- http://mail.python.org/mailman/listinfo/python-list