Manipulating bitsets in struct

[Allen]

I'm using Python to do some simple network programming, and found the
struct module very useful for such things, but is there a way to easily
manipulate bitsets such as a 16 bit word being split into 4 parts like 2
bits, 1 bit, 4 bits, and 9 bits?

Perhaps something like:

struct.pack('!h (2:1:4:9)',2,0, 1,100)


Brian Vanderburg II

[Larry Bates]

Re: Manipulating bitsets in struct

Allen wrote:

I'm using Python to do some simple network programming, and found the
struct module very useful for such things, but is there a way to easily
manipulate bitsets such as a 16 bit word being split into 4 parts like 2
bits, 1 bit, 4 bits, and 9 bits?
>
Perhaps something like:
>
struct.pack('!h (2:1:4:9)',2,0, 1,100)
>
>
Brian Vanderburg II
>
>
>
>
>

Just 'or' them together after shifting to the left the appropriate number of bits.

-Larry

[Marc 'BlackJack' Rintsch]

Re: Manipulating bitsets in struct

On Wed, 09 Jul 2008 20:04:24 -0400, Allen wrote:

I'm using Python to do some simple network programming, and found the
struct module very useful for such things, but is there a way to easily
manipulate bitsets such as a 16 bit word being split into 4 parts like 2
bits, 1 bit, 4 bits, and 9 bits?
>
Perhaps something like:
>
struct.pack('!h (2:1:4:9)',2,0, 1,100)

Take a look at Construct_ instead of `struct`.

... _Construct: http://construct.wikispaces.com/

Ciao,
Marc 'BlackJack' Rintsch