A puzzle for Pythonistas

[Magnus Lie Hetland]

In article <slrnb43kc0.fvh.mlh at furu.idi.ntnu.no>, Magnus Lie Hetland wrote:
>In article <b68f71a7.0301310459.31539d3c at posting.google.com>, Alan
>James Salmoni wrote:
[snip]
>from numarray import compress
>def subsets(seq):
>    n = len(seq)
>    for i in xrange(2**n):
>        cond = [bool(2<<j & i) for j in xrange(n)]

Ehm... The bool(...) is quite redundant. Just use the bit manipulation
expression on its own :)

>        yield compress(cond, seq)

-- 
Magnus Lie Hetland               "Nothing shocks me. I'm a scientist." 
http://hetland.org                                   -- Indiana Jones