struct.unpack less than 1 byte

[Stargaming]

On Wed, 10 Oct 2007 03:42:15 -0700, John Machin wrote:

> On Oct 10, 8:15 pm, "Guilherme Polo" <ggp... at gmail.com> wrote:
>> 2007/10/10, cprogrammer <cprogram... at gmail.com>:
>> > i need to read from a file a struct like this [1byte, 12bits, 12bits]
>> > reading 1 byte or more is not a problem ... but the 12 bits values
>> > are ...
>>
>> 12bits, 12bits == 3 byes
> 
> and 8 + 12 + 12 = 32 :-)
[snipped bitfiddling]

Or, if you're doing more of those parsing tasks (or just dislike bit 
shifting), you could have a look into `construct`_::

    >>> from construct import *
    >>> foo = BitStruct("foo", 
    ...     Octet("spam"), # synonym for BitField("spam", 8) 
    ...     BitField("ham", 12), 
    ...     BitField("eggs", 12)
    ... )
    >>> foo
    Buffered('foo')
    >>> foo.parse("\xff\xff\xff\xff")
    Container(eggs = 4095, ham = 4095, spam = 255)

Cheers,
Stargaming

.. _construct: http://construct.wikispaces.com/