On Nov 29, 7:07 am, "Gianmaria Iaculo - NVENTA" <[EMAIL PROTECTED]> wrote: > Hi there, > I'm so new to python (coming from .net so excuse me for the stupid question) > and i'm tring to do a very simple thing,with bytes. > > My problem is this: > > i've a byte that naturally is composed from 2 nibbles hi&low, and two > chars.. like A nd B. What i wonna do is to write A to the High nibble and B > to the the lower nibble.
But a nibble is 4 bits and a char in general is 8 bits. Please explain "write A to the high nibble". Let's assume that you mean that 0 <= A <= 15 .... The building blocks that you need are the ord() and chr() builtin functions, and the << (shift-left) operator. The hex() function is useful for seeing what is happening. >>> a = '\x07' >>> b = '\x08' >>> c = 7 >>> d = 8 >>> ord(a) 7 >>> chr(c) '\x07' >>> hex(c) '0x7' >>> hex(c << 4) '0x70' >>> hex((ord(a) << 4) + ord(b)) '0x78' >>> hex((c << 4) + d) '0x78' >>> Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
