struct.pack and perl's 'B' code for bitstrings

[Justin Johnson]

Yes, I meant 'featureful'.  Thank you for your advice.  This helpful for
me.  Part of the problem is I haven't done much with byte/bit
manipulation, so when I don't have the capabilities I'm used to I have a
hard time being inovative.  :-(

Thanks much.
-Justin

On Sat, 28 Jun 2003 04:49:46 -0400, "Oren Tirosh" <oren-py-l at hishome.net>
said:
> On Fri, Jun 27, 2003 at 02:19:35PM -0600, Justin Johnson wrote:
> > Is there anything equivalent to perl's pack code B, which allows you to
> > specify bits to pack?  For example, in perl, pack('B8', '00000010') will
> > return 8 bits exactly as the bit string appears.  I don't see any similar
> > codes in struct.pack.  In general struct.pack is not as robust as perl's
> > pack function.  
> 
> Are you using the word 'robust' to mean 'featureful'?  
> 
> > Is there a better version of struct somewhere, or how are
> > people overcoming some of these problems?
> 
> I've heard of some alternative version of struct. I've never checked if 
> they have bitstring options. When I need something like this I just use 
> the int or long constructor with radix 2:
> 
> >>> struct.pack('B', int('00000010', 2))
> '\x02'
> 
> >>> struct.pack('>H', int('0001001000011000', 2))
> '\x12\x18'
> 
>     Oren
>