On Aug 23, 10:51 pm, "Adam W." <[EMAIL PROTECTED]> wrote: > I'm dabbling with AVR's for a project I have and that means I have to > use C (ageist my will). Because my AVR will be tethered to my laptop, > I am writing most of my logic in python, in the hopes of using at > little C as possible. > > In my quest I came across a need to pass a pair of sign extended two's > complement bytes. After painfully reading the wikipedia article on > what two's complement was, I then thought of how I would handle this > in python. I don't really recall ever having to work in binary with > python, so I really am clueless on what to do. > > I can feed python either two hex bytes or binary, but how do I convert > it into an int, and more importantly how do I make sure it handles the > sign properly?
Try this out. Does it come close to what you want? import struct struct.pack( 'i', ~10 ) ~struct.unpack( 'i', _ )[ 0 ] >>> import struct >>> struct.pack( 'i', ~10 ) '\xf5\xff\xff\xff' >>> ~struct.unpack( 'i', _ )[ 0 ] 10 >>> -- http://mail.python.org/mailman/listinfo/python-list
