Break up list into groups

[Paul Rubin]

"danmcleran at yahoo.com" <danmcleran at yahoo.com> writes:
> I can't seem to find an answer to this question anywhere, but I'm
> still looking. My problem is I have a list of values like this:
> 
> l = [0xF0, 1, 2, 3, 0xF0, 4, 5, 6, 0xF1, 7, 8, 0xF2, 9, 10, 11, 12,
> 13, 0xF0, 14, 0xF1, 15]
> 
> A value with bit 0x80 set delineates the start of a new packet of
> information. What I want to do is to group the packets so that 1, 2, 3
> go with the 1st packet tagged 0xF0, 4 ,5, 6 go with the 2nd packet
> tagged 0xF0, 7 & 8 go with the packet tagged 0xF1 and so on. The
> length of the data associated with each tag can vary. I've already
> written an algorithm to do this but I was wondering if some
> combination of itertools functions could do the job faster?

See:

http://groups.google.com/group/comp.lang.python/msg/2410c95c7f3b3654