Please Criticize My Code

[bearophileHUGS at lycos.com]

Two versions of mine, one of the fastest (not using Psyco) and one of
the shortest:

. from itertools import groupby
.
. def audioactiveFast(n):
.     strl = {("1","1","1"): "31", ("1","1"): "21", ("1",): "11",
.             ("2","2","2"): "32", ("2","2"): "22", ("2",): "12",
.             ("3","3","3"): "33", ("3","3"): "23", ("3",): "13" }
.     result = [1]
.     prec = "1"
.     for i in xrange(n-1):
.         prec = "".join( strl[tuple(l)] for e,l in groupby(prec) )
.         result.append( int(prec) )
.     return result
.
.
. def audioactiveShort(n):
.     s = [1]
.     for i in xrange(n-1):
.         r = 0
.         for e,l in groupby(str(s[-1])):
.             r = r*100 + len(list(l))*10 + int(e)
.         s.append( r )
.     return s

Bye,
bearophile