U are really nice guys... i'm really apreciating (sorry 4 my bad english) Chriss is right this are coordinates.... and i'm treating as strings naturally I dont really have floating points on my module.. it run a 1.5 python version from Telit. So i dont have zLib too... just have 1.5 Mb of Ram and 3Mb of Rom... not realy confortable..isn't it?
I'm tring some experiments on the command line... i've tried this: My longitude is 42.237897 so as a first step... i created a X and done this job as your examples: a = 4 b = 2 x = (a<<4)|b x is 66 so i can do: aDecoded = x >> 4 and i have the 4 again...( a value) but i've some problems while i decode the b.... Where i go wrong? Gianmaria Firma Gianmaria Iaculo "Chris Mellon" <[EMAIL PROTECTED]> ha scritto nel messaggio news:[EMAIL PROTECTED] > On Nov 28, 2007 3:18 PM, J. Clifford Dyer <[EMAIL PROTECTED]> wrote: >> On Wed, Nov 28, 2007 at 10:05:40PM +0100, Gianmaria Iaculo - NVENTA wrote >> regarding Re: Bit Operations: >> > >> > Txs all, >> > i wont to respond to who asked why i needed it: >> > >> > I'm using python on GSM modules and the informations i have to move >> > goes >> > along GPRS/UMTS connections so it's beatiful for me to transfer more >> > informations with less space... >> > imagine i have to send this simple data.... >> > >> > 41.232323,12.345678 >> > >> > i can send it as it's or use the nibble trick and on the receiving >> > station >> > 'unlift" the data and rebuild the original information... >> > >> > isn'it??? >> > >> >> Um, no. It isn't. How exactly are you going to pack floating point >> numbers into a half a byte? >> >> Or are you sending it as strings? Also a waste of space, and >> unnecessarily complex. >> > > Assuming these are coordinates, not floats, using strings makes sense > but the zlib module is probably a much better choice than a > hand-written compression scheme. -- http://mail.python.org/mailman/listinfo/python-list
