-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Simon Forman Sent: Wednesday, July 26, 2006 2:56 PM To: python-list@python.org Subject: Re: Splitting a float into bytes:
Michael Yanowitz wrote: > Hello: > > For some reason I can't figure out how to split > a 4-byte (for instance) float number (such as 3.14159265359) > into its 4-bytes so I can send it via a socket to another > computer. > For integers, it is easy, I can get the 4 bytes by anding like: > byte1 = int_val & 0x000000FF > byte2 = int_val & 0x0000FF00 > byte3 = int_val & 0x00FF0000 > byte4 = int_val & 0xFF000000 > But if I try to do that with floats I get: > >>> pi & 0xFF > Traceback (most recent call last): > File "<stdin>", line 1, in ? > TypeError: unsupported operand type(s) for &: 'float' and 'int' > > Is there some easy way to get what the bytes of the float are? > > Thanks in advance: > Michael Yanowitz The struct module. (It also works for ints. ;-) ) http://docs.python.org/lib/module-struct.html HTH, ~Simon Thanks, but maybe I am missing something. If I use pack, doesn't it have to be unpacked at the other end to make sense? The data will be picked up on some other computer by some other application probably written in C or C++. Would it have to be rewritten to unpack the data? Thanks in advance: Michael Yanowitz -- http://mail.python.org/mailman/listinfo/python-list