On 30 mai, 20:42, Ian Kelly <ian.g.ke...@gmail.com> wrote: > On Thu, May 30, 2013 at 12:26 PM, Mok-Kong Shen > > <mok-kong.s...@t-online.de> wrote: > > Am 27.05.2013 17:30, schrieb Ned Batchelder: > > >> On 5/27/2013 10:45 AM, Mok-Kong Shen wrote: > > >>> From an int one can use to_bytes to get its individual bytes, > >>> but how can one reconstruct the int from the sequence of bytes? > > >> The next thing in the docs after int.to_bytes is int.from_bytes: > >>http://docs.python.org/3.3/library/stdtypes.html#int.from_bytes > > > I am sorry to have overlooked that. But one thing I yet wonder is why > > there is no direct possibilty of converting a byte to an int in [0,255], > > i.e. with a constrct int(b), where b is a byte. > > The bytes object can be viewed as a sequence of ints. So if b is a > bytes object of non-zero length, then b[0] is an int in range(0, 256).
---- Well, Python now "speaks" only "integer", the rest is commodity and there is a good coherency. >>> bin(255) '0b11111111' >>> oct(255) '0o377' >>> 255 255 >>> hex(255) '0xff' >>> >>> int('0b11111111', 2) 255 >>> int('0o377', 8) 255 >>> int('255') 255 >>> int('0xff', 16) 255 >>> >>> 0b11111111 255 >>> 0o377 255 >>> 255 255 >>> 0xff 255 >>> >>> type(0b11111111) <class 'int'> >>> type(0o377) <class 'int'> >>> type(255) <class 'int'> >>> type(0xff) <class 'int'> jmf -- http://mail.python.org/mailman/listinfo/python-list