On Mon, Jul 6, 2009 at 4:48 AM, Timo<timomli...@gmail.com> wrote: > I have written a program that uses a C++ module as backend. Now I found out > that I can use Python to call an underneath C lib. That's nice, so I don't > need to Popen() the C++ module. > > I have a problem though with some info that is returned (always an integer). > I'll try to explain a bit, this is what I found out so far. > There are 4 options in the program. The first 3 options go up to 18 and the > fourth to 7. > If all options are set to 0, the returned int is 0. > If the first option is set from 1 to 18, this is what I get returned. > However, for option 2, I get 256, 512, 768, 1024, etc. > For option 3 I get 65536, 131072, 196608, etc, etc. > And for option 4: 16777216, 33554432, etc. > > Ok, that's nice so far. But if option 1 is set to 4 and option 2 is set to 8 > and option 3 is set to 10 (for example), I get this returned: 657412 > > The C++ module counts the bytes. First byte = option1, second byte = option2 > etc. > u8 *options = (u8 *)&result[1]; > option1 = options[0] > option2 = options[1] > option3 = options[2] > option4 = options[3] > > How will I approach this in Python?
Looks like you need the struct module. Kent _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
