All,
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?
Here's what I've done and the expected output of the algorithm:
def splitIntoGroups(data):
groups = []
local = []
for value in data:
if 0x80 & value:
if len(local) > 0:
groups.append(local)
local = []
local.append(value)
else:
local.append(value)
if len(local) > 0:
groups.append(local)
return groups
l = [0xF0, 1, 2, 3, 0xF0, 4, 5, 6, 0xF1, 7, 8, 0xF2, 9, 10, 11, 12,
13, 0xF0, 14, 0xF1, 15]
print splitIntoGroups(l)
Desired result:
[[240, 1, 2, 3], [240, 4, 5, 6], [241, 7, 8], [242, 9, 10, 11, 12,
13], [240, 14], [241, 15]]
Thanks,
Dan McLeran
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