i'm lost in list manipulation
Paul Rubin
http
Thu Mar 4 04:39:00 EST 2004
"GrelEns" <grelens at NOSPAMyahoo.NOTNEEDEDfr> writes:
> i'm not happy with this code, must be an other shorter alternative, have you
> any siggestions on how to build these sets [[1], [2], [3], [1, 2], [1, 3],
> [2, 3], [1, 2, 3]] from [1,2,3] ?
def subsets(lst):
def subgen(lst):
if not lst:
yield lst
return
for s in subsets(lst[1:]):
yield s
yield [lst[0]] + s
return list(subgen([1,2,3]))[1:] # discard empty subset
print subsets([1,2,3])
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